Methyl fluoride
- Formula: CH3F
- Molecular weight: 34.0329
- IUPAC Standard InChI: InChI=1S/CH3F/c1-2/h1H3
- IUPAC Standard InChIKey: NBVXSUQYWXRMNV-UHFFFAOYSA-N
- CAS Registry Number: 593-53-3
- 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: Fluoromethane; Methane, fluoro-; Freon 41; CH3F; UN 2454; R 41; HFC-41; Refrigerant gas R 41
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Gas phase thermochemistry data
Go To: Top, 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -55.999 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1963 |
| ΔfH°gas | -59.0 | kcal/mol | Ion | Lias, Karpas, et al., 1985 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 53.260 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1963 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1200. | 1200. to 6000. |
|---|---|---|
| A | -2.103870 | 21.18760 |
| B | 37.01150 | 2.413841 |
| C | -21.78540 | -0.463092 |
| D | 5.150591 | 0.030811 |
| E | 0.162692 | -5.145550 |
| F | -56.28989 | -73.38301 |
| G | 41.51759 | 64.53979 |
| H | -56.00010 | -56.00010 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1963 | Data last reviewed in December, 1963 |
References
Go To: Top, Gas phase thermochemistry data, 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]
Lias, Karpas, et al., 1985
Lias, S.G.; Karpas, Z.; Liebman, J.F.,
Halomethylenes: effects of halogen substitution on absolute heats of formation,
J. Am. Chem. Soc., 1985, 107, 6089-6096. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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