Cycloheptane
- Formula: C7H14
- Molecular weight: 98.1861
- IUPAC Standard InChI: InChI=1S/C7H14/c1-2-4-6-7-5-3-1/h1-7H2
- IUPAC Standard InChIKey: DMEGYFMYUHOHGS-UHFFFAOYSA-N
- CAS Registry Number: 291-64-5
- Chemical structure:
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Gas 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 by: Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°gas | 81.82 ± 0.30 | cal/mol*K | N/A | Finke H.L., 1956 |
Constant pressure heat capacity of gas
| Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 9.068 | 50. | Dorofeeva O.V., 1986 | Discrepancies between recommended Cp(T) values and those calculated by molecular mechanics method [ Chang S., 1970] amount to 3.6-7.7 J/mol*K; discrepancies in S(T) values increase at high temperatures up to 2.3 J/mol*K for 500 K. |
| 12.46 | 100. | ||
| 16.35 | 150. | ||
| 20.76 | 200. | ||
| 28.592 | 273.15 | ||
| 31.55 ± 0.84 | 298.15 | ||
| 31.773 | 300. | ||
| 43.793 | 400. | ||
| 54.606 | 500. | ||
| 63.683 | 600. | ||
| 71.231 | 700. | ||
| 77.555 | 800. | ||
| 82.902 | 900. | ||
| 87.450 | 1000. | ||
| 91.331 | 1100. | ||
| 94.656 | 1200. | ||
| 97.512 | 1300. | ||
| 99.971 | 1400. | ||
| 102.10 | 1500. |
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.
Finke H.L., 1956
Finke H.L.,
Cycloheptane, cyclooctane, and 1,3,5-cycloheptatriene. Low-temperature thermal properties, vapor pressure, and derived chemical thermodynamic properties,
J. Am. Chem. Soc., 1956, 78, 5469-5476. [all data]
Dorofeeva O.V., 1986
Dorofeeva O.V.,
Thermodynamic properties of twenty-one monocyclic hydrocarbons,
J. Phys. Chem. Ref. Data, 1986, 15, 437-464. [all data]
Chang S., 1970
Chang S.,
The heats of combustion and strain energies of bicyclo[n.m.0]alkanes,
J. Am. Chem. Soc., 1970, 92, 3109-3118. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas S°gas Entropy of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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