Dichlorodifluoromethane
- Formula: CCl2F2
- Molecular weight: 120.914
- IUPAC Standard InChI: InChI=1S/CCl2F2/c2-1(3,4)5
- IUPAC Standard InChIKey: PXBRQCKWGAHEHS-UHFFFAOYSA-N
- CAS Registry Number: 75-71-8
- 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, dichlorodifluoro-; Algofrene Type 2; Arcton 12; Arcton 6; Chlorofluoromethane (CCl2F2); Difluorodichloromethane; Electro-CF 12; F 12; Freon 12; Frigen 12; FC 12; Genetron 12; Isceon 122; Isotron 12; Ledon 12; R 12; R 12, Refrigerant; Refrigerant 12; CF2Cl2; Fluorocarbon 12; Propellant 12; Dwuchlorodwufluorometan; Eskimon 12; Freon F-12; Kaiser chemicals 12; Rcra waste number U075; Ucon 12; Ucon 12/halocarbon 12; UN 1028; CCl2F2; Halon 122; CFC-12; Halocarbon 12; Isotron 2; Propellent 12; Refrigerant R12; Chlorofluorocarbon 12; Dymel 12; FCC 12; FKW 12; Forane 12
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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 | -491.62 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1970 |
| ΔfH°gas | -477.6 ± 5.6 | kJ/mol | Cm | Kolesov, Zenkov, et al., 1963 | Reanalyzed by Cox and Pilcher, 1970, Original value = -469.0 ± 5.0 kJ/mol; Reaction with Na; ALS |
| ΔfH°gas | -477. ± 13. | kJ/mol | Ccb | Wartenberg and Schiefer, 1955 | Reanalyzed by Cox and Pilcher, 1970, Original value = -473. kJ/mol; ALS |
| ΔfH°gas | -469. ± 8. | kJ/mol | Cm | Kirkbride and Davidson, 1954 | Von Wartenberg method; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 300.89 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1970 |
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 1100. | 1100. to 6000. |
|---|---|---|
| A | 48.01014 | 107.3635 |
| B | 139.1808 | 0.404844 |
| C | -124.3326 | -0.082033 |
| D | 39.75147 | 0.005689 |
| E | -0.633834 | -5.707394 |
| F | -513.2304 | -539.7486 |
| G | 319.1028 | 406.4660 |
| H | -491.6200 | -491.6200 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1970 | Data last reviewed in June, 1970 |
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]
Kolesov, Zenkov, et al., 1963
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M.,
Standard enthalpies of formation of chlorotrifluoromethane and dichlorodifluoromethane,
Russ. J. Phys. Chem. (Engl. Transl.), 1963, 37, 378-379. [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]
Wartenberg and Schiefer, 1955
Wartenberg, H.V.; Schiefer, J.,
Bildungswarmen von fluor-chlor-kohlenstoff-verbindungen,
Z. Anorg. Chem., 1955, 278, 326-332. [all data]
Kirkbride and Davidson, 1954
Kirkbride, F.W.; Davidson, F.G.,
Heats of formation of gaseous fluoro- and fluorochloro-carbons,
Nature (London), 1954, 174, 79-80. [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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