Nitrogen
- Formula: N2
- Molecular weight: 28.0134
- IUPAC Standard InChIKey: IJGRMHOSHXDMSA-UHFFFAOYSA-N
- CAS Registry Number: 7727-37-9
- 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 gas; N2; UN 1066; UN 1977; Dinitrogen; Molecular nitrogen; Diatomic nitrogen; Nitrogen-14
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Phase change data
Go To: Top, Reaction thermochemistry data, 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 |
---|---|---|---|---|---|
Tboil | 77.34 | K | N/A | Jacobsen, Stewart, et al., 1986 | TRC |
Tboil | 77.4 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 63.3 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 63.14 | K | N/A | Jacobsen, Stewart, et al., 1986 | TRC |
Ttriple | 63.14 | K | N/A | Angus, de Reuck, et al., 1979 | Uncertainty assigned by TRC = 0.005 K; TRC |
Ttriple | 63.14 | K | N/A | Henning and Otto, 1936 | Uncertainty assigned by TRC = 0.06 K; temperature measured with He gas thermometer; TRC |
Ttriple | 63.13 | K | N/A | Giauque and Clayton, 1933 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.06 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ptriple | 0.1252 | bar | N/A | Jacobsen, Stewart, et al., 1986 | Uncertainty assigned by TRC = 0.0005 bar; TRC |
Ptriple | 0.1253 | bar | N/A | Angus, de Reuck, et al., 1979 | Uncertainty assigned by TRC = 0.0002 bar; TRC |
Ptriple | 0.126 | bar | N/A | Henning and Otto, 1936 | Uncertainty assigned by TRC = 0.0007 bar; TRC |
Ptriple | 0.1253 | bar | N/A | Giauque and Clayton, 1933 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.0001 bar; Average Pressure; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 126.19 | K | N/A | Jacobsen, Stewart, et al., 1986 | Uncertainty assigned by TRC = 0.01 K; TRC |
Tc | 126.2 | K | N/A | Angus, de Reuck, et al., 1979 | Uncertainty assigned by TRC = 0.05 K; TRC |
Tc | 126.2 | K | N/A | Weber, 1970 | Uncertainty assigned by TRC = 0.2 K; IPTS-68, critical point not observed and Tc taken from literature but equation would allow pc to be calculated. Tc unct. several tenths K. "Ultra-high" purity nitrogen.; TRC |
Tc | 128.45 | K | N/A | Cardoso, 1915 | Uncertainty assigned by TRC = 0.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 33.978 | bar | N/A | Jacobsen, Stewart, et al., 1986 | Uncertainty assigned by TRC = 0.007 bar; TRC |
Pc | 34.00 | bar | N/A | Angus, de Reuck, et al., 1979 | Uncertainty assigned by TRC = 0.05 bar; TRC |
Pc | 3.0698 | bar | N/A | Cardoso, 1915 | Uncertainty assigned by TRC = 0.003 bar; TRC |
Pc | 3.0682 | bar | N/A | Cardoso, 1915 | Uncertainty assigned by TRC = 0.003 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 11.18 | mol/l | N/A | Jacobsen, Stewart, et al., 1986 | Uncertainty assigned by TRC = 0.02 mol/l; TRC |
ρc | 11.2 | mol/l | N/A | Angus, de Reuck, et al., 1979 | Uncertainty assigned by TRC = 0.02 mol/l; TRC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
6.1 | 78. | Edejer and Thodos, 1967 | Based on data from 63. to 126. K.; AC |
5.6 | 77. | Giauque and Clayton, 1933, 2 | 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 |
---|---|---|---|---|---|
63.14 to 126. | 3.7362 | 264.651 | -6.788 | Edejer and Thodos, 1967 | Coefficents calculated by NIST from author's data. |
63.14 to 78.00 | 3.63792 | 257.877 | -6.344 | Moussa, Muijlwijk, et al., 1966 | Coefficents calculated by NIST from author's data. |
Reaction thermochemistry data
Go To: Top, Phase change data, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
MS - José A. Martinho Simões
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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- + N2 = (NO- • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19. ± 1. | kJ/mol | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
ΔrH° | 20. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; ΔrS+-12. J/mol*K; M |
ΔrH° | 18. | kJ/mol | HPMS | Speller, Fitaire, et al., 1983 | gas phase; Entropy change is questionable; M |
ΔrH° | 22. | kJ/mol | HPMS | Turner and Conway, 1976 | gas phase; M |
ΔrH° | 19. | kJ/mol | DT | Johnsen, Huang, et al., 1975 | gas phase; corrected for ln T by Keesee and Castleman, 1986; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 71.1 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
ΔrS° | 57.7 | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; ΔrS+-12. J/mol*K; M |
ΔrS° | 55.6 | J/mol*K | HPMS | Speller, Fitaire, et al., 1983 | gas phase; Entropy change is questionable; M |
ΔrS° | 79.1 | J/mol*K | HPMS | Turner and Conway, 1976 | gas phase; M |
ΔrS° | 65.7 | J/mol*K | DT | Johnsen, Huang, et al., 1975 | gas phase; corrected for ln T by Keesee and Castleman, 1986; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
2. | 200. | FA | Dunkin, Fehsenfeld, et al., 1971 | gas phase; M |
By formula: N2+ + N2 = (N2+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 102. to 102. | kJ/mol | RNG | N/A | Range of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 87.9 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrS° | 67.8 | J/mol*K | PHPMS | Teng and Conway, 1973 | gas phase; M |
ΔrS° | 81.6 | J/mol*K | PHPMS | Payzant and Kebarle, 1970 | gas phase; M |
ΔrS° | 46. | J/mol*K | DT | Varney, 1968 | gas phase; Entropy change is questionable; M |
ΔrS° | -4. | J/mol*K | DT | Varney, 1959 | gas phase; Entropy change is questionable; M |
By formula: O2+ + N2 = (O2+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21. ± 1. | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrH° | 22. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; M |
ΔrH° | 24. | kJ/mol | PHPMS | Janik and Conway, 1967 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 72.8 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrS° | 66.1 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; M |
ΔrS° | 79.1 | J/mol*K | PHPMS | Janik and Conway, 1967 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
0.0 | 296. | FA | Howard, Bierbaum, et al., 1972 | gas phase; M |
By formula: (HN2+ • 4N2) + N2 = (HN2+ • 5N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 13. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 95.8 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 84. | J/mol*K | N/A | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
5.9 | 92. | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
By formula: (O2- • 7N2 • O2) + N2 = (O2- • 8N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrH° | 6.40 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 74.9 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 75.3 | J/mol*K | N/A | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
By formula: (O2+ • 2N2) + N2 = (O2+ • 3N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 18. ± 1. | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrH° | 15. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 82.0 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrS° | 50.6 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
By formula: (O2+ • N2) + N2 = (O2+ • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19. ± 1. | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrH° | 18. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 79.9 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrS° | 57.7 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
By formula: (NO- • N2) + N2 = (NO- • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 17. ± 1. | kJ/mol | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
ΔrH° | 16. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 72.8 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
ΔrS° | 52.7 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
C3N2NiO3 (solution) = C3NiO3 (solution) + (solution)
By formula: C3N2NiO3 (solution) = C3NiO3 (solution) + N2 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 42. ± 4. | kJ/mol | KinS | Turner, Simpson, et al., 1983 | solvent: Liquid krypton; The reaction enthalpy relies on the experimental value for the activation enthalpy, 42. ± 4. kJ/mol, and on the assumption that the activation enthalpy for product recombination is negligible Turner, Simpson, et al., 1983.; MS |
By formula: N+ + N2 = (N+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 249. | kJ/mol | N/A | National Bureau of Standards, 1968 | gas phase; from ΔrH(f); M |
ΔrH° | 250. | kJ/mol | EI | Saporoschenko, 1965 | gas phase; M |
ΔrH° | 250. | kJ/mol | EI | Franklin, Dibeler, et al., 1958 | gas phase; M |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
361. (+7.5,-0.) | CID | Haynes, Freysinger, et al., 1995 | gas phase; guided ion beam CID; M |
By formula: Cu+ + N2 = (Cu+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 26. | kJ/mol | HPMS | El-Shall, Schriver, et al., 1989 | gas phase; Cu+ from laser desrption; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67. | J/mol*K | HPMS | El-Shall, Schriver, et al., 1989 | gas phase; Cu+ from laser desrption; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 5.9 | kJ/mol | HPMS | El-Shall, Schriver, et al., 1989 | gas phase; Cu+ from laser desrption; M |
By formula: (HN2+ • 2N2) + N2 = (HN2+ • 3N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 14. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 16. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84.1 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 84. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
By formula: (HN2+ • 3N2) + N2 = (HN2+ • 4N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 14. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 15. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88.7 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 84. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
By formula: (HN2+ • N2) + N2 = (HN2+ • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 15. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 17. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 80.3 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 75. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
By formula: Na+ + N2 = (Na+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33. | kJ/mol | FA | Perry, Rowe, et al., 1980 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 77.8 | J/mol*K | FA | Perry, Rowe, et al., 1980 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
9.2 | 310. | FA | Perry, Rowe, et al., 1980 | gas phase; M |
8.4 | 310. | DT | Beyer and Keller, 1971 | gas phase; low E/N; M |
By formula: HN2+ + N2 = (HN2+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 66.9 | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
ΔrH° | 60.7 | kJ/mol | PHPMS | Meot-Ner (Mautner) and Field, 1974 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
ΔrS° | 85.4 | J/mol*K | PHPMS | Meot-Ner (Mautner) and Field, 1974 | gas phase; M |
C39H66N2O3P2W (solution) + (g) = C39H68O3P2W (solution) +
(g)
By formula: C39H66N2O3P2W (solution) + H2 (g) = C39H68O3P2W (solution) + N2 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 18.4 ± 1.7 | kJ/mol | EqS | Gonzalez and Hoff, 1989 | solvent: Tetrahydrofuran; Temperature range: 288-308 K; MS |
C39H66MoO3P3 (solution) + (g) = C39H66MoN2O3P2 (solution)
By formula: C39H66MoO3P3 (solution) + N2 (g) = C39H66MoN2O3P2 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -37.7 ± 2.5 | kJ/mol | EqS | Gonzalez and Hoff, 1989 | solvent: Tetrahydrofuran; Temperature range: 294-308 K; MS |
By formula: (H3O+ • 2N2 • 3H2O) + N2 = (H3O+ • 3N2 • 3H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.0 | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; ΔrH, ΔrS approximate; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 27. | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; ΔrH, ΔrS approximate; M |
By formula: (O2+ • 4N2) + N2 = (O2+ • 5N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.3 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67.8 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
3. | 184. | HPMS | Speller and Fitaire, 1983 | gas phase; M |
By formula: (NO- • 2N2) + N2 = (NO- • 3N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16. ± 1. | kJ/mol | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 70.3 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
4. | 204. | HPMS | Speller, Fitaire, et al., 1983 | gas phase; M |
By formula: (NO- • 3N2) + N2 = (NO- • 4N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 14. ± 1. | kJ/mol | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 74.9 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
2. | 204. | HPMS | Speller, Fitaire, et al., 1983 | gas phase; M |
By formula: (O2+ • 3N2) + N2 = (O2+ • 4N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 17. ± 1. | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 94.1 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
3. | 204. | HPMS | Speller and Fitaire, 1983 | gas phase; M |
By formula: (H3O+ • 3N2 • 2H2O) + N2 = (H3O+ • 4N2 • 2H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; ΔrH, ΔrS approximate; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 50. | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; ΔrH, ΔrS approximate; M |
By formula: (NO- • 9N2) + N2 = (NO- • 10N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.03 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1989 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 79. | J/mol*K | N/A | Hiraoka and Yamabe, 1989 | gas phase; Entropy change calculated or estimated; M |
By formula: (HN2+ • 10N2) + N2 = (HN2+ • 11N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.20 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | N/A | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated; M |
By formula: O3- + N2 = (O3- • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.3 ± 0.84 | kJ/mol | TDAs | Hiraoka, 1988 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 77.0 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -11.7 ± 2.1 | kJ/mol | TDAs | Hiraoka, 1988 | gas phase; B |
By formula: (C2H5+ • N2) + N2 = (C2H5+ • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19. | kJ/mol | HPMS | Speller, 1983 | gas phase; deuterated, Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 45.6 | J/mol*K | HPMS | Speller, 1983 | gas phase; deuterated, Entropy change is questionable; M |
By formula: (N2+ • N2) + N2 = (N2+ • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.5 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
ΔrH° | 5.9 | kJ/mol | PI | Linn, Ono, et al., 1981 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 62.8 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
By formula: (O2+ • O2) + N2 = (O2+ • N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 42.3 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
By formula: (Na+ • N2) + N2 = (Na+ • 2N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22. | kJ/mol | FA | Perry, Rowe, et al., 1980 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 70.3 | J/mol*K | FA | Perry, Rowe, et al., 1980 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
-1. | 310. | FA | Perry, Rowe, et al., 1980 | gas phase; M |
By formula: (CH2N+ • 2N2) + N2 = (CH2N+ • 3N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13. | kJ/mol | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 54.8 | J/mol*K | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
By formula: (CH2N+ • 3N2) + N2 = (CH2N+ • 4N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13. | kJ/mol | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 57.7 | J/mol*K | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
By formula: (CH2N+ • 4N2) + N2 = (CH2N+ • 5N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13. | kJ/mol | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 63.6 | J/mol*K | HPMS | Speller, Fitaire, et al., 1982 | gas phase; Entropy change is questionable; M |
By formula: C4H4BrNO2 + 0.5H4N2 = HBr + C4H5NO2 + 0.5N2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -260.3 ± 0.46 | kJ/mol | Cm | Howard and Skinner, 1966 | solid phase; solvent: Aqueous solution; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -261.7 ± 0.46 kJ/mol; ALS |
By formula: O2- + N2 = (O2- • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25. ± 4.2 | kJ/mol | N/A | Posey and Johnson, 1988 | gas phase; B |
ΔrH° | <56.90 | kJ/mol | IMRB | Adams and Bohme, 1970 | gas phase; N2..O2- + O2 -> O4-; B |
C12H34P4Ru (solution) + (solution) = C12H32N2P4Ru (solution) +
(solution)
By formula: C12H34P4Ru (solution) + N2 (solution) = C12H32N2P4Ru (solution) + H2 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16.3 | kJ/mol | PAC | Belt, Scaiano, et al., 1993 | solvent: Cyclohexane; The reaction enthalpy relies on 0.85 for the quantum yield of H2 dissociation.; MS |
By formula: (H3O+ • 2N2 • 2H2O) + N2 = (H3O+ • 3N2 • 2H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 38. ± 11. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 119. | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; M |
(solution) +
(solution) = C8H5N2O3V (solution) +
(solution)
By formula: C9H5O4V (solution) + N2 (solution) = C8H5N2O3V (solution) + CO (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 27. ± 4. | kJ/mol | PAC | Johnson, Popov, et al., 1991 | solvent: Heptane; The reaction enthalpy relies on 0.80 for the quantum yield of CO dissociation.; MS |
By formula: (O2- • 2N2 • O2) + N2 = (O2- • 3N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10.3 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 76.6 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 3N2 • O2) + N2 = (O2- • 4N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.2 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 4N2 • O2) + N2 = (O2- • 5N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 81.6 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 5N2 • O2) + N2 = (O2- • 6N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.6 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 81.6 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 6N2 • O2) + N2 = (O2- • 7N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.7 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • N2 • O2) + N2 = (O2- • 2N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.7 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 74.9 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (H3O+ • 2N2 • H2O) + N2 = (H3O+ • 3N2 • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33. ± 8. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; M |
By formula: (H3O+ • N2 • 2H2O) + N2 = (H3O+ • 2N2 • 2H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 69.5 | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; M |
By formula: (H3O+ • N2 • 3H2O) + N2 = (H3O+ • 2N2 • 3H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 18. | kJ/mol | DT | Gheno and Fitaire, 1987 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 65.7 | J/mol*K | DT | Gheno and Fitaire, 1987 | gas phase; M |
By formula: (O2+ • 10N2) + N2 = (O2+ • 11N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6. ± 1. | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84.5 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
By formula: (N2+ • 10N2) + N2 = (N2+ • 11N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.9 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84.5 | J/mol*K | PHPMS | Hiraoka and Nakajima, 1988 | gas phase; M |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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Giauque and Clayton, 1933
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Heat Capacity and Entropy of Nitrogen. Heat of Vaporization. Vapor Pressure of Solid and Liquid. The Reaction 1/2 N2 + 1/2 O2 = NO from Spectroscopic Data,
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Association of N2 with NH4+ and H3O+(H2O)n, n = 1,2,3,
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Three - Body Association Reactions of NO+ and O2+ with N2,
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Bonding in Heteromolecular Ion Clusters. N2O2+,
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Notes
Go To: Top, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
Pc Critical pressure Ptriple Triple point pressure T Temperature Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔvapH Enthalpy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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