Nitrous oxide
- Formula: N2O
- Molecular weight: 44.0128
- IUPAC Standard InChIKey: GQPLMRYTRLFLPF-UHFFFAOYSA-N
- CAS Registry Number: 10024-97-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Nitrogen oxide (N2O); Dinitrogen monoxide; Dinitrogen oxide; Laughing gas; N2O; Factitious air; Hyponitrous acid anhydride; Nitrogen oxide; UN 1070; UN 2201; Nitrogen monoxide; Nitral
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Reaction thermochemistry data: reactions 51 to 83
- Henry's Law data
- Gas phase ion energetics data
- Ion clustering data
- IR Spectrum
- Fluid Properties
- Data at other public NIST sites:
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Gas phase thermochemistry data
Go To: Top, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 82.05 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1964 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 219.96 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1964 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 1400. | 1400. to 6000. |
---|---|---|
A | 27.67988 | 60.30274 |
B | 51.14898 | 1.034566 |
C | -30.64454 | -0.192997 |
D | 6.847911 | 0.012540 |
E | -0.157906 | -6.860254 |
F | 71.24934 | 48.61390 |
G | 238.6164 | 272.5002 |
H | 82.04824 | 82.04824 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in December, 1964 | Data last reviewed in December, 1964 |
Phase change data
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Ptriple | 0.87890 | bar | N/A | Fonseca and Lobo, 1989 | Uncertainty assigned by TRC = 0.0001 bar; TRC |
Ptriple | 0.8791 | bar | N/A | Calado, Rebelo, et al., 1986 | Uncertainty assigned by TRC = 0.00008 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 309.56 | K | N/A | Ohgaki, Umezono, et al., 1990 | Uncertainty assigned by TRC = 0.15 K; TRC |
Tc | 309.65 | K | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tc | 309.49 | K | N/A | Tsiklis and Prokhorov, 1967 | TRC |
Tc | 309.55 | K | N/A | Cook, 1953 | Uncertainty assigned by TRC = 0.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 72.38 | bar | N/A | Ohgaki, Umezono, et al., 1990 | Uncertainty assigned by TRC = 0.20 bar; TRC |
Pc | 72.70 | bar | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.50 bar; TRC |
Pc | 72.346 | bar | N/A | Cook, 1953 | Uncertainty assigned by TRC = 0.5066 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.0955 | l/mol | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.002 l/mol; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 10.3 | mol/l | N/A | Ohgaki, Umezono, et al., 1990 | Uncertainty assigned by TRC = 0.1 mol/l; TRC |
ρc | 10.2 | mol/l | N/A | Tsiklis and Prokhorov, 1967 | Visual in pVT apparatus, Khodeeva and Lebedeva Russ. J. Phys. Chem. 1966, 40, 1668.; TRC |
ρc | 10.3 | mol/l | N/A | Cook, 1953 | Uncertainty assigned by TRC = 0.05 mol/l; TRC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
16.5 | 184.7 | Atake and Chihara, 1974 | AC |
16.1 | 221. | Hoge, 1945 | Based on data from 182. to 236. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
129.8 to 187.7 | 4.37799 | 621.077 | -44.659 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
25.1 ± 0.4 | 74. | LE | Bryson, Cazcarra, et al., 1974 | Based on data from 68. to 80. K.; AC |
24.6 | 161. | N/A | Blue and Giauque, 1935 | Based on data from 148. to 182. K.; AC |
23.6 | 113. | MG | Black, van Praagh, et al., 1930 | Based on data from 103. to 123. K.; AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
6.5 | 182.4 | Atake and Chihara, 1974 | AC |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Reactions 1 to 50
By formula: NO- + N2O = (NO- • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 60. ± 100. | kJ/mol | AVG | N/A | Average of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 75. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrS° | 62.3 | J/mol*K | DT | Illies, 1988 | gas phase; ΔrH(0 K)=32.2 kJ/mol; M |
By formula: NO2+ + N2O = (NO2+ • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 59.0 | kJ/mol | EI | Cameron, Aitken, et al., 1994 | gas phase; M |
ΔrH° | 72.8 | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrH° | 55. ± 3. | kJ/mol | DT | Illies, 1988 | gas phase; ΔrH(0 K)=55.7 kJ/mol; M |
ΔrH° | 54.8 | kJ/mol | PI | Linn and Ng, 1981 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrS° | 51.9 | J/mol*K | DT | Illies, 1988 | gas phase; ΔrH(0 K)=55.7 kJ/mol; M |
By formula: O2+ + N2O = (O2+ • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 56.1 | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrH° | 45. ± 2. | kJ/mol | DT | Illies, 1988 | gas phase; ΔrH(0 K)=45.2 kJ/mol; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 96. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrS° | 64.0 | J/mol*K | DT | Illies, 1988 | gas phase; ΔrH(0 K)=45.2 kJ/mol; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
37. | 200. | FA | Adams and Bohme, 1970 | gas phase; switching reaction(O2+)O2; M |
By formula: (I- • 2N2O) + N2O = (I- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
ΔrH° | 13. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 63. | J/mol*K | N/A | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: (NO- • N2O) + N2O = (NO- • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 24.7 ± 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
ΔrH° | 19.2 | kJ/mol | N/A | Coe, Snodgrass, et al., 1987 | gas phase; B |
ΔrH° | 23. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
ΔrH° | 30. | kJ/mol | PES | Coe, Snodgrass, et al., 1986 | gas phase; D(N2O)2 not accounted for; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -4.2 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (NO- • 2N2O) + N2O = (NO- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.8 ± 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
ΔrH° | 21. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 96. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrS° | 88. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -5.0 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (I- • N2O) + N2O = (I- • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
ΔrH° | 14. ± 1. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 59.4 | J/mol*K | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
By formula: I- + N2O = (I- • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
ΔrH° | 16. ± 1. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 59.0 | J/mol*K | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
By formula: HN2O+ + N2O = (HN2O+ • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 69.9 | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrH° | 86.2 | kJ/mol | PHPMS | Szulejko and McMahon, 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
ΔrS° | 132. | J/mol*K | PHPMS | Szulejko and McMahon, 1992 | gas phase; M |
By formula: (O2- • 2N2O) + N2O = (O2- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 26.8 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O2- • 3N2O) + N2O = (O2- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 23.8 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -6.3 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O2- • 4N2O) + N2O = (O2- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.2 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -7.9 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O2- • 5N2O) + N2O = (O2- • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20.9 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -9.2 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • 2N2O) + N2O = (O- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.6 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -4. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • 3N2O) + N2O = (O- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.8 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -8.4 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • 4N2O) + N2O = (O- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.8 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -9.6 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • 5N2O) + N2O = (O- • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.3 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 110. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -11. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • 6N2O) + N2O = (O- • 7N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.3 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 120. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -14. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O- • N2O) + N2O = (O- • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.6 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 79. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -1. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (O2- • N2O) + N2O = (O2- • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 36.4 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 110. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 3. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: O2- + N2O = (O2- • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | <56.90 | kJ/mol | IMRB | Adams and Bohme, 1970 | gas phase; N2O..O2- + O2 -> O4- + N2O; B |
ΔrH° | 37. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 110. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
By formula: (NO- • 3N2O) + N2O = (NO- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20.9 ± 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
ΔrH° | 19. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -5.0 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (NO- • 4N2O) + N2O = (NO- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 17.6 ± 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
ΔrH° | 19. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -6.3 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (H3O+ • 3N2O) + N2O = (H3O+ • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88. | J/mol*K | N/A | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
By formula: (NO2+ • 5N2O) + N2O = (NO2+ • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | N/A | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
By formula: (HN2O+ • 5N2O) + N2O = (HN2O+ • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 130. | J/mol*K | N/A | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated; M |
By formula: (Cl- • 4N2O) + N2O = (Cl- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | N/A | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: (F- • 6N2O) + N2O = (F- • 7N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 14. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84. | J/mol*K | N/A | Hiraoka, Aruga, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: (NO2+ • 2N2O) + N2O = (NO2+ • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. | kJ/mol | EI | Cameron, Aitken, et al., 1994 | gas phase; M |
ΔrH° | 23. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
By formula: (NO2+ • N2O) + N2O = (NO2+ • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21. | kJ/mol | EI | Cameron, Aitken, et al., 1994 | gas phase; M |
ΔrH° | 24. | kJ/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 75. | J/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; M |
By formula: (NO- • 5N2O) + N2O = (NO- • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 18.4 ± 0.84 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -7.9 ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: (NO- • 6N2O) + N2O = (NO- • 7N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 17.6 ± 1.3 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B,M,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -11. ± 4.2 | kJ/mol | TDAs | Hiraoka, Fujimaki, et al., 1994, 2 | gas phase; B |
By formula: CH3+ + N2O = (CH3+ • N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 221. | kJ/mol | PHPMS | McMahon, Heinis, et al., 1988 | gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M |
By formula: (I- • 10N2O) + N2O = (I- • 11N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.2 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 11N2O) + N2O = (I- • 12N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.4 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 9N2O) + N2O = (I- • 10N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.5 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 3N2O) + N2O = (I- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 4N2O) + N2O = (I- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 5N2O) + N2O = (I- • 6N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.6 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 6N2O) + N2O = (I- • 7N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.2 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 7N2O) + N2O = (I- • 8N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.8 ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (I- • 8N2O) + N2O = (I- • 9N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10. ± 8.4 | kJ/mol | PDis | Arnold, Bradforth, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
(N2O2- • 4294967295) + = N2O2-
By formula: (N2O2- • 4294967295N2O) + N2O = N2O2-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 96.7 ± 5.0 | kJ/mol | N/A | Li and Continetti, 2002 | gas phase; B |
ΔrH° | 135.1 ± 2.9 | kJ/mol | LPD | Osboen, Leahy, et al., 1996 | gas phase; Affinity at 0 K; B |
By formula: (HO- • 3N2O) + N2O = (HO- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | >30. ± 140. | kJ/mol | N/A | Kim, Wenthold, et al., 1998 | gas phase; Vertical Detachment Energy: 2.981 eV. Affinity is EA difference with next lower +0.08 eV f; B |
By formula: (HO- • 4N2O) + N2O = (HO- • 5N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | >20. ± 230. | kJ/mol | N/A | Kim, Wenthold, et al., 1998 | gas phase; Vertical Detachment Energy: 3.146 eV. Affinity is EA difference with next lower +0.08 eV f; B |
By formula: (HO- • 2N2O) + N2O = (HO- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28.9 | kJ/mol | N/A | Kim, Wenthold, et al., 1998 | gas phase; Vertical Detachment Energy: 2.761 eV. Affinity is EA difference with next lower +0.08 eV f; B |
By formula: (HO- • N2O) + N2O = (HO- • 2N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 32.6 | kJ/mol | N/A | Kim, Wenthold, et al., 1998 | gas phase; Vertical Detachment Energy: 2.485 eV. Affinity is EA difference with next lower +0.08 eV f; B |
By formula: (Cl- • 2N2O) + N2O = (Cl- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21. ± 1. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 83.7 | J/mol*K | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
By formula: (Cl- • 3N2O) + N2O = (Cl- • 4N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20. ± 1. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 87.4 | J/mol*K | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
By formula: (F- • 2N2O) + N2O = (F- • 3N2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 35. ± 1. | kJ/mol | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 98.7 | J/mol*K | PHPMS | Hiraoka, Aruga, et al., 1993 | gas phase; M |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
NIST MS number | 70 |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SPB-1 | 182. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
Capillary | SPB-1 | 182. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Fonseca and Lobo, 1989
Fonseca, I.M.A.; Lobo, L.Q.,
Thermodynamics of liquid mixtures of xenon and methyl fluoride,
Fluid Phase Equilib., 1989, 47, 249. [all data]
Calado, Rebelo, et al., 1986
Calado, J.C.G.; Rebelo, L.P.N.; Streett, W.B.; Zollweg, J.A.,
Thermodynamics of liquid (dimethylether + xenon),
J. Chem. Thermodyn., 1986, 18, 931. [all data]
Ohgaki, Umezono, et al., 1990
Ohgaki, K.; Umezono, S.; Katayama, T.,
Pressure-density-temperature (p-ρ-T) relations of fluoroform, nitrous oxide, and propene in the critical region,
J. Supercrit. Fluids, 1990, 3, 78-84. [all data]
Li and Kiran, 1988
Li, L.; Kiran, E.,
Gas-Liquid Critical Properties of Methylamine + Nitrous Oxide and Methylamine + Ethylene Binary Mixtures,
J. Chem. Eng. Data, 1988, 33, 342. [all data]
Tsiklis and Prokhorov, 1967
Tsiklis, D.S.; Prokhorov, V.M.,
Phase equilibria in systems containing fluorine compounds,
Zh. Fiz. Khim., 1967, 41, 2195-9. [all data]
Cook, 1953
Cook, D.,
Vapor Pressure and Orthobaric Density of Nitrous Oxide,
Trans. Faraday Soc., 1953, 49, 716. [all data]
Atake and Chihara, 1974
Atake, Tooru; Chihara, Hideaki,
A New Condensed Gas Calorimeter. Thermodynamic Properties of Solid and Liquid Dinitrogen Oxide,
Bull. Chem. Soc. Jpn., 1974, 47, 9, 2126-2136, https://doi.org/10.1246/bcsj.47.2126
. [all data]
Hoge, 1945
Hoge, H.J.,
Vapor pressure, latent heat of vaporization, and triple-point temperature of N2O,
J. RES. NATL. BUR. STAN., 1945, 34, 3, 281-17, https://doi.org/10.6028/jres.034.015
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Bryson, Cazcarra, et al., 1974
Bryson, Charles E.; Cazcarra, Victor; Levenson, Leonard L.,
Sublimation rates and vapor pressures of water, carbon dioxide, nitrous oxide, and xenon,
J. Chem. Eng. Data, 1974, 19, 2, 107-110, https://doi.org/10.1021/je60061a021
. [all data]
Blue and Giauque, 1935
Blue, R.W.; Giauque, W.F.,
The Heat Capacity and Vapor Pressure of Solid and Liquid Nitrous Oxide. The Entropy from its Band Spectrum,
J. Am. Chem. Soc., 1935, 57, 6, 991-997, https://doi.org/10.1021/ja01309a008
. [all data]
Black, van Praagh, et al., 1930
Black, H.K.; van Praagh, G.; Topley, B.,
Note on the vapour pressure of solid nitrous oxide,
Trans. Faraday Soc., 1930, 26, 196, https://doi.org/10.1039/tf9302600196
. [all data]
Hiraoka, Fujimaki, et al., 1994
Hiraoka, K.; Fujimaki, S.; Aruga, K.; Sato, T.; Yamabe, S.,
Gas-Phase Solavtion of NO+, O2+, N2O+, and H3O+ with N2O,
J. Chem. Phys., 1994, 101, 5, 4073, https://doi.org/10.1063/1.467524
. [all data]
Illies, 1988
Illies, A.J.,
Thermochemistry of the Gas - Phase Ion - Molecule Clustering of CO2+CO2, SO2+CO2, N2O+N2O, O2+CO2, NO+CO2 and NO+N2O: Description of a New Hybrid Drift Tube/Ion Source with Coaxial Electron Beam and Ion Exit Apertures,
J. Phys. Chem., 1988, 92, 10, 2889, https://doi.org/10.1021/j100321a037
. [all data]
Cameron, Aitken, et al., 1994
Cameron, B.R.; Aitken, C.G.; Harland, P.W.,
Appearence Energies of Small Cluster Ions and their Fragments,
J. Chem. Soc. Faraday Trans., 1994, 90, 7, 935, https://doi.org/10.1039/ft9949000935
. [all data]
Linn and Ng, 1981
Linn, S.H.; Ng, C.Y.,
Photoionization Study of CO2, N2O Dimers and Clusters,
J. Chem. Phys., 1981, 75, 10, 4921, https://doi.org/10.1063/1.441931
. [all data]
Adams and Bohme, 1970
Adams, N.G.; Bohme, D.,
Flowing Afterglow Studies of Formation and Reactions of Cluster Ions of O2+, O2-, and O-,
J. Chem. Phys., 1970, 52, 6, 3133, https://doi.org/10.1063/1.1673449
. [all data]
Arnold, Bradforth, et al., 1995
Arnold, D.W.; Bradforth, S.E.; Kim, E.H.; Neumark, D.M.,
Study of I-(CO2)n, Br-(CO2)n, and I-(N2O)n clusters by anion photoelectron spectroscopy,
J. Chem. Phys., 1995, 102, 9, 3510, https://doi.org/10.1063/1.468576
. [all data]
Hiraoka, Aruga, et al., 1993
Hiraoka, K.; Aruga, K.; Fujimaki, S.; Yamabe, S.,
Comparative Study of the Gas Phase Bond Strengths of CO2 and N2O with the Halide Ions,
J. Am. Soc. Mass Spectrom., 1993, 4, 1, 58, https://doi.org/10.1016/1044-0305(93)85043-W
. [all data]
Hendricks, de Clercq, et al., 2002
Hendricks, J.H.; de Clercq, H.L.; Freidhoff, C.B.; Arnold, S.T.; Eaton, J.G.; Fancher, C.; Lyapustina, S.A.; S.,
Anion solvation at the microscopic level: Photoelectron spectroscopy of the solvated anion clusters, NO-(Y)(n), where Y=Ar, Kr, Xe, N2O, H2S, NH3, H2O, and C2H4(OH)(2),
J. Chem. Phys., 2002, 116, 18, 7926-7938, https://doi.org/10.1063/1.1457444
. [all data]
Coe, Snodgrass, et al., 1987
Coe, J.V.; Snodgrass, J.T.; Freidhoff, C.B.; McHugh, K.M.; Bowen, K.H.,
Photoelectron spectroscopy of the negative cluster ions, NO-(N2O)n=1,2,
J. Chem. Phys., 1987, 87, 4302. [all data]
Hiraoka, Fujimaki, et al., 1994, 2
Hiraoka, K.; Fujimaki, S.; Aruga, K.; Yamabe, S.,
Gas-phase clustering reactions of O2(-), NO-, and O- with N2O: Isomeric structures for (NO-N2O)(-),
J. Phys. Chem., 1994, 98, 34, 8295, https://doi.org/10.1021/j100085a006
. [all data]
Coe, Snodgrass, et al., 1986
Coe, J.V.; Snodgrass, J.T.; Freidhoff, C.B.; McHugh, K.M.; Bowen, K.H.,
Negative ion photoelectron spectroscopy of N2O- and (N2O)2-,
Chem. Phys. Lett., 1986, 124, 274. [all data]
Szulejko and McMahon, 1992
Szulejko, J.; McMahon, T.B.,
personal communication, 1992. [all data]
McMahon, Heinis, et al., 1988
McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P.,
Methyl Cation Affinities,
J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002
. [all data]
Foster, Williamson, et al., 1974
Foster, M.S.; Williamson, A.D.; Beauchamp, J.L.,
Photoionization mass spectrometry of trans-azomethane,
Int. J. Mass Spectrom. Ion Phys., 1974, 15, 429. [all data]
Li and Continetti, 2002
Li, R.J.; Continetti, R.E.,
Studies of the excited state dynamics of N2O2 by dissociative photodetachment of N2O2-,
J. Phys. Chem. A, 2002, 106, 7, 1183-1189, https://doi.org/10.1021/jp013330u
. [all data]
Osboen, Leahy, et al., 1996
Osboen, D.L.; Leahy, D.J.; Cyr, D.R.; Neumark, D.M.,
Photodissociation Spectroscopy and Dynamics of the N2O2- Anion,
J. Chem. Phys., 1996, 104, 13, 5026, https://doi.org/10.1063/1.471132
. [all data]
Kim, Wenthold, et al., 1998
Kim, J.B.; Wenthold, P.G.; Lineberger, W.C.,
Photoelectron spectroscopy of OH-(N2O)(n=1-5),
J. Chem. Phys., 1998, 108, 3, 830-837, https://doi.org/10.1063/1.475447
. [all data]
Flanagan, Streete, et al., 1997
Flanagan, R.J.; Streete, P.J.; Ramsey, J.D.,
Volatile Substance Abuse, UNODC Technical Series, No 5, United Nations, Office on Drugs and Crime, Vienna International Centre, PO Box 500, A-1400 Vienna, Austria, 1997, 56, retrieved from http://www.odccp.org/pdf/technicalseries1997-01-011.pdf. [all data]
Strete, Ruprah, et al., 1992
Strete, P.J.; Ruprah, M.; Ramsey, J.D.; Flanagan, R.J.,
Detection and identification of volatile substances by headspace capillary gas chromatography to aid the diagnosis of acute poisoning,
Analyst, 1992, 117, 7, 1111-1127, https://doi.org/10.1039/an9921701111
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Pc Critical pressure Ptriple Triple point pressure S°gas,1 bar Entropy of gas at standard conditions (1 bar) T Temperature Tc Critical temperature Vc Critical volume ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfusH Enthalpy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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