Chloromethane
- Formula: CH3Cl
- Molecular weight: 50.488
- IUPAC Standard InChI: InChI=1S/CH3Cl/c1-2/h1H3
- IUPAC Standard InChIKey: NEHMKBQYUWJMIP-UHFFFAOYSA-N
- CAS Registry Number: 74-87-3
- 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: Methane, chloro-; Methyl chloride; Artic; Freon 40; Monochloromethane; CH3Cl; Chloor-methaan; Chlor-methan; Chlorure de methyle; Clorometano; Cloruro di metile; Methylchlorid; Metylu chlorek; R 40; Rcra waste number U045; UN 1063; Refrigerant R40
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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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -83.68 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1972 |
| ΔfH°gas | -81.9 ± 1.5 | kJ/mol | Review | Manion, 2002 | adopted flame calorimetry data of Fletcher and Pilcher, 1971 with increased uncertainty to reflect other data; DRB |
| ΔfH°gas | -81.96 ± 0.67 | kJ/mol | Ccb | Fletcher and Pilcher, 1971, 2 | ALS |
| ΔfH°gas | -85.90 ± 0.59 | kJ/mol | Chyd | Lacher, Emery, et al., 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = -86.33 ± 0.59 kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°gas | -764.0 ± 0.50 | kJ/mol | Ccb | Fletcher and Pilcher, 1971, 2 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 234.36 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1972 |
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 1200. | 1200. to 6000. |
|---|---|---|
| A | 3.524690 | 88.66691 |
| B | 136.9277 | 10.06834 |
| C | -82.14196 | -1.928737 |
| D | 20.22797 | 0.128191 |
| E | 0.278032 | -19.76840 |
| F | -89.19995 | -152.5311 |
| G | 202.8391 | 286.4015 |
| H | -83.68000 | -83.68000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1972 | Data last reviewed in June, 1972 |
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]
Manion, 2002
Manion, J.A.,
Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons,
J. Phys. Chem. Ref. Data, 2002, 31, 1, 123-172, https://doi.org/10.1063/1.1420703
. [all data]
Fletcher and Pilcher, 1971
Fletcher, R.A.; Pilcher, G.,
Measurements of heats of combustion by flame calorimetry. Part 7.?Chloromethane, chloroethane, 1-chloropropane, 2-chloropropane,
Trans. Faraday Soc., 1971, 67, 3191, https://doi.org/10.1039/tf9716703191
. [all data]
Fletcher and Pilcher, 1971, 2
Fletcher, R.A.; Pilcher, G.,
Measurements of heats of combustion by flame calorimetry. Part 7.-Chloromethane, chloroethane, 1-chloropropane, 2-chloropropane,
Trans. Faraday Soc., 1971, 67, 3191-3201. [all data]
Lacher, Emery, et al., 1956
Lacher, J.R.; Emery, E.; Bohmfalk, E.; Park, J.D.,
Reaction heats of organic compounds. IV. A high temperature calorimeter and the hydrogenation of methyl ethyl and vinyl chlorides,
J. Phys. Chem., 1956, 60, 492-495. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [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) ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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