Cyclopentene
- Formula: C5H8
- Molecular weight: 68.1170
- IUPAC Standard InChI: InChI=1S/C5H8/c1-2-4-5-3-1/h1-2H,3-5H2
- IUPAC Standard InChIKey: LPIQUOYDBNQMRZ-UHFFFAOYSA-N
- CAS Registry Number: 142-29-0
- Chemical structure:
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 1.02 ± 0.15 | kcal/mol | Ccb | Labbauf and Rossini, 1961 | ALS |
| ΔfH°liquid | 1.16 ± 0.16 | kcal/mol | Ccb | Epstein, Pitzer, et al., 1949 | Unpubished results; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -744.55 ± 0.14 | kcal/mol | Ccb | Labbauf and Rossini, 1961 | Corresponding ΔfHºliquid = 1.03 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 48.100 | cal/mol*K | N/A | Huffman, Eaton, et al., 1948 | DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 29.250 | 298.15 | Huffman, Eaton, et al., 1948 | T = 12 to 300 K.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Labbauf and Rossini, 1961
Labbauf, A.; Rossini, F.D.,
Heats of combustion, formation, and hydrogenation of 14 selected cyclomonoolefin hydrocarbons,
J. Phys. Chem., 1961, 65, 476-480. [all data]
Epstein, Pitzer, et al., 1949
Epstein, M.B.; Pitzer, K.S.; Rossini, F.D.,
Heats, equilibrium constants, and free energies of formation of cyclopentene and cyclohexene,
J. Res. NBS, 1949, 42, 379-382. [all data]
Huffman, Eaton, et al., 1948
Huffman, H.M.; Eaton, M.; Oliver, G.D.,
The heat capacities, heats of transition, heats of fusion and entropies of cyclopentene and cyclohexene,
J. Am. Chem. Soc., 1948, 70, 2911-2914. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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