fluorine
- Formula: F2
- Molecular weight: 37.9968064
- IUPAC Standard InChI: InChI=1S/F2/c1-2
- IUPAC Standard InChIKey: PXGOKWXKJXAPGV-UHFFFAOYSA-N
- CAS Registry Number: 7782-41-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Gas phase thermochemistry data
Go To: Top, Phase change data, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°gas,1 bar | 202.791 ± 0.005 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 202.80 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1982 |
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 6000. |
|---|---|
| A | 31.44510 |
| B | 8.413831 |
| C | -2.778850 |
| D | 0.218104 |
| E | -0.211175 |
| F | -10.43260 |
| G | 237.2770 |
| H | 0.000000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1982 |
Phase change data
Go To: Top, Gas phase thermochemistry data, 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 85.2 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.3 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 55.2 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.3 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Tc | 144. | K | N/A | Cady and Hildebrand, 1930 | Uncertainty assigned by TRC = 1. K; in glass capillary tube; TRC |
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 |
|---|---|---|---|---|---|
| 53.99 to 143.99 | 4.02355 | 322.067 | -4.748 | Straty and Prydz, 1970 | Coefficents calculated by NIST from author's data. |
| 50. to 85.3 | 4.62315 | 417.961 | 5.415 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
B - John E. Bartmess
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.
Individual Reactions
2 = 4
+ 5
+ 3
By formula: 2C2F11N5 = 4CF4 + 5N2 + 3F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -3009. ± 13. | kJ/mol | Cm | Sinke, Thompson, et al., 1967 | gas phase; Energy of explosion; ALS |
CF5N = + 0.5
+ 0.5
By formula: CF5N = CF4 + 0.5N2 + 0.5F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -226. ± 2. | kJ/mol | Ccb | Walker, 1972 | gas phase; Decompostion reaction; ALS |
+ 0.5
+ 0.5
= CF5N
By formula: CF4 + 0.5N2 + 0.5F2 = CF5N
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 226. ± 2. | kJ/mol | Ccb | Walker, 1972 | gas phase; Decompostion reaction; ALS |
2 = 2
+ 3
+ 3
By formula: 2CF7N3 = 2CF4 + 3N2 + 3F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1467. | kJ/mol | Cm | Sinke, Thompson, et al., 1967 | gas phase; Energy of explosion; ALS |
2 = 2
+ 3
+
By formula: 2CF5N3 = 2CF4 + 3N2 + F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -2059. | kJ/mol | Cm | Sinke, Thompson, et al., 1967 | gas phase; Energy of explosion; ALS |
=
+ 2
+ 2
By formula: CF8N4 = CF4 + 2N2 + 2F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -935.1 | kJ/mol | Cm | Sinke, Thompson, et al., 1967 | gas phase; Energy of explosion; ALS |
=
+
+
By formula: CF6N2 = CF4 + N2 + F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -478.2 | kJ/mol | Cm | Sinke, Thompson, et al., 1967 | gas phase; Energy of explosion; ALS |
+
= F3-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 97. ± 10. | kJ/mol | CIDT | Artau, Nizzi, et al., 2000 | gas phase; B |
+ 4
=
+ 4
By formula: CF4 + 4HF = CH4 + 4F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1922. ± 13. | kJ/mol | Cm | Jessup, McCoskey, et al., 1955 | gas phase; ALS |
+ 2
= 2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1037.3 | kJ/mol | Ccb | Domalski and Armstrong, 1967 | solid phase; ALS |
References
Go To: Top, Gas phase thermochemistry data, 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.
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Streng, 1971
Streng, A.G.,
Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature,
J. Chem. Eng. Data, 1971, 16, 357. [all data]
Cady and Hildebrand, 1930
Cady, G.H.; Hildebrand, J.H.,
The Vapor Pressure and Critical Temperature of Fluorine,
J. Am. Chem. Soc., 1930, 52, 3839. [all data]
Straty and Prydz, 1970
Straty, G.C.; Prydz, R.,
The Vapor Pressure of Liquid Fluorine,
Adv. Cryog. Eng., 1970, 15, 36-41. [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]
Sinke, Thompson, et al., 1967
Sinke, G.C.; Thompson, C.J.; Jostad, R.E.; Walker, L.C.; Swanson, A.C.; Stull, D.R.,
Enthalpies of formation and bond energies of some fluoramines,
J. Chem. Phys., 1967, 47, 1852-1854. [all data]
Walker, 1972
Walker, L.C.,
The enthalpy of decomposition of CF3NF2(g) to CF4(g), N2(g), and F2(g),
J. Chem. Thermodyn., 1972, 4, 219-223. [all data]
Artau, Nizzi, et al., 2000
Artau, A.; Nizzi, K.E.; Hill, B.T.; Sunderlin, L.S.; Wenthold, P.G.,
Bond dissociation energy in trifluoride ion,
J. Am. Chem. Soc., 2000, 122, 43, 10667-10670, https://doi.org/10.1021/ja001613e
. [all data]
Jessup, McCoskey, et al., 1955
Jessup, R.S.; McCoskey, R.E.; Nelson, R.A.,
The heat of formation of tetrafluoromethane,
J. Am. Chem. Soc., 1955, 77, 244-245. [all data]
Domalski and Armstrong, 1967
Domalski, E.S.; Armstrong, G.T.,
The heats of combustion of polytetrafluoroethylene (teflon) and graphite in elemental fluorine,
J. Res. NBS, 1967, 71, 105-118. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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