Ethane, hexafluoro-
- Formula: C2F6
- Molecular weight: 138.0118
- IUPAC Standard InChI: InChI=1S/C2F6/c3-1(4,5)2(6,7)8
- IUPAC Standard InChIKey: WMIYKQLTONQJES-UHFFFAOYSA-N
- CAS Registry Number: 76-16-4
- 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: Perfluoroethane; F-116; Freon 116; Hexafluoroethane; C2F6; Fluorocarbon 116; UN 2193; Freon 1166SY; 1,1,1,2,2,2-Hexafluoroethane; R 116; Ethane, 1,1,1,2,2,2-hexafluoro-; HFC 116
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°liquid | 250.54 | J/mol*K | N/A | Pace and Aston, 1948 |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 131.3 | 195. | Pace and Aston, 1948 | T = 12 to 195 K. |
Reaction thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Henry's Law 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 by: 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.
Individual Reactions
3 + 2
= 6
+
By formula: 3C2F6 + 2F3N = 6CF4 + N2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1304. ± 13. | kJ/mol | Ccb | Sinke, 1966 | gas phase |
+
= 2
By formula: C2N2 + C2F6 = 2C2F3N
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 44.10 ± 0.59 | kJ/mol | Eqk | Walker, Sinke, et al., 1970 | gas phase |
+
= 2
By formula: C2F6 + Br2 = 2CBrF3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 15.3 ± 0.59 | kJ/mol | Eqk | Coomber and Whittle, 1967 | gas phase |
Henry's Law data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Rolf Sander
Henry's Law constant (water solution)
kH(T) = k°H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
k°H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)
| k°H (mol/(kg*bar)) | d(ln(kH))/d(1/T) (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 0.000058 | Q | N/A | missing citation give several references for the Henry's law constants but don't assign them to specific species. |
References
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Pace and Aston, 1948
Pace, E.L.; Aston, J.G.,
The thermodynamics of hexafluoroethane from calorimetric and spectroscopic data,
J. Am. Chem. Soc., 1948, 70, 566-570. [all data]
Sinke, 1966
Sinke, G.C.,
The heat of reaction of nitrogen trifluoride and hexafluoroethane,
J. Phys. Chem., 1966, 70, 1326-1327. [all data]
Walker, Sinke, et al., 1970
Walker, L.C.; Sinke, G.C.; Perettie, D.J.; Janz, G.J.,
Enthalpy of formation of trifluoroacetonitrile,
J. Am. Chem. Soc., 1970, 92, 4525-4526. [all data]
Coomber and Whittle, 1967
Coomber, J.W.; Whittle, E.,
Bond dissociation energies from equilibrium studies. Part 2.-D(CF3-CF3) and enthalpy of formation of C2F6,
Trans. Faraday Soc., 1967, 63, 1394-1401. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions d(ln(kH))/d(1/T) Temperature dependence parameter for Henry's Law constant k°H Henry's Law constant at 298.15K ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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