Fluoroform
- Formula: CHF3
- Molecular weight: 70.0138
- IUPAC Standard InChI: InChI=1S/CHF3/c2-1(3)4/h1H
- IUPAC Standard InChIKey: XPDWGBQVDMORPB-UHFFFAOYSA-N
- CAS Registry Number: 75-46-7
- 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, trifluoro-; Arcton 1; Fluoryl; Freon F-23; Freon 23; Genetron 23; Methyl trifluoride; R 23; Trifluoromethane; CHF3; Arcton; Halocarbon 23; UN 1984; Carbon trifluoride; Genetron HFC23; Propellant 23; Refrigerant 23; FC 23 (fluorocarbon); FC 23; R 23 (halocarbon); HFC 23
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
- NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
- NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
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 | -697.05 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1969 |
| ΔfH°gas | -690.8 | kJ/mol | Eqk | Goy, Lord, et al., 1967 | ALS |
| ΔfH°gas | -695.4 ± 2.7 | kJ/mol | Ccr | Neugebauer and Margrave, 1957 | Reanalyzed by Cox and Pilcher, 1970, Original value = -680.3 ± 2.7 kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°gas | -71.55 ± 0.71 | kJ/mol | Eqk | Goy, Lord, et al., 1967 | ALS |
| ΔcH°gas | -516.3 | kJ/mol | Ccr | Neugebauer and Margrave, 1957 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 259.65 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1969 |
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.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. to 1200. | 1200. to 6000. |
|---|---|---|
| A | 6.463694 | 100.5352 |
| B | 185.4332 | 3.936630 |
| C | -140.8870 | -0.757020 |
| D | 39.84921 | 0.050454 |
| E | 0.064514 | -13.51683 |
| F | -705.8450 | -759.4546 |
| G | 218.4579 | 336.4170 |
| H | -697.0544 | -697.0544 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1969 | Data last reviewed in June, 1969 |
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]
Goy, Lord, et al., 1967
Goy, C.A.; Lord, A.; Pritchard, H.O.,
Kinetics and thermodynamics of the reaction between iodine and fluoroform and the heat of formation of trifluoromethyl iodide,
J. Phys. Chem., 1967, 71, 1086-1089. [all data]
Neugebauer and Margrave, 1957
Neugebauer, C.A.; Margrave, J.L.,
Heats of formation of the fluoromethanes and fluoroethylenes,
Tech. Rept., 1957, 1-45. [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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.