Cyclopentane
- Formula: C5H10
- Molecular weight: 70.1329
- IUPAC Standard InChI: InChI=1S/C5H10/c1-2-4-5-3-1/h1-5H2
- IUPAC Standard InChIKey: RGSFGYAAUTVSQA-UHFFFAOYSA-N
- CAS Registry Number: 287-92-3
- 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: Pentamethylene; UN 1146
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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
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -76.40 ± 0.79 | kJ/mol | Ccb | McCullough, Pennington, et al., 1959 | ALS |
| ΔfH°gas | -76.9 | kJ/mol | N/A | Spitzer and Huffman, 1947 | Value computed using ΔfHliquid° value of -105.6±1.8 kj/mol from Spitzer and Huffman, 1947 and ΔvapH° value of 28.7 kj/mol from Prosen, Johnson, et al., 1946.; DRB |
| ΔfH°gas | -77.24 ± 0.75 | kJ/mol | Ccb | Prosen, Johnson, et al., 1946 | ALS |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 37.58 | 50. | Dorofeeva O.V., 1986 | Recommended values are in good agreement with those calculated by [ Kilpatrick J.E., 1947, McCullough J.P., 1959] at low temperatures. The discrepancies increase at higher temperatures and amount to 1.8 J/mol*K for S(1500 K) and 2.1 J/mol*K for Cp(1500 K) obtained by [ McCullough J.P., 1959]. Calculation [ Sundaram S., 1963] seems to be incorrect because discrepancies with these data reach 23 and 7 J/mol*K for S(T) and Cp(T), respectively.; GT |
| 40.18 | 100. | ||
| 45.30 | 150. | ||
| 54.19 | 200. | ||
| 74.48 | 273.15 | ||
| 82.8 ± 2.0 | 298.15 | ||
| 83.39 | 300. | ||
| 118.15 | 400. | ||
| 150.05 | 500. | ||
| 177.07 | 600. | ||
| 199.70 | 700. | ||
| 218.80 | 800. | ||
| 235.02 | 900. | ||
| 248.88 | 1000. | ||
| 260.76 | 1100. | ||
| 270.96 | 1200. | ||
| 279.75 | 1300. | ||
| 287.34 | 1400. | ||
| 293.92 | 1500. |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 93.96 ± 0.19 | 329.05 | McCullough J.P., 1959 | Please also see Spitzer R., 1946.; GT |
| 102.01 ± 0.84 | 353. | ||
| 108.16 ± 0.84 | 372. | ||
| 117.3 ± 1.3 | 395. | ||
| 117.09 ± 0.23 | 395.05 | ||
| 126.3 ± 1.3 | 424. | ||
| 138.7 ± 1.3 | 463. | ||
| 139.47 ± 0.28 | 463.10 | ||
| 150.7 ± 1.7 | 503. | ||
| 160.1 ± 1.7 | 539. |
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.
McCullough, Pennington, et al., 1959
McCullough, J.P.; Pennington, R.E.; Smith, J.C.; Hossenlopp, I.A.; Waddington, G.,
Thermodynamics of cyclopentane, methylcyclopentane and 1,cis-3-dimethylcyclopentane: Verification of the concept of pseudorotation,
J. Am. Chem. Soc., 1959, 81, 5880-5883. [all data]
Spitzer and Huffman, 1947
Spitzer, R.; Huffman, H.M.,
The heats of combustion of cyclopentane, cyclohexane, cycloheptane and cyclooctane,
J. Am. Chem. Soc., 1947, 69, 211-213. [all data]
Prosen, Johnson, et al., 1946
Prosen, E.J.; Johnson, W.H.; Rossini, F.D.,
Heats of formation and combustion of the normal alkylcyclopentanes and cyclohexanes and the increment per CH2 group for several homologous series of hydrocarbons,
J. Res. NBS, 1946, 37, 51-56. [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]
Kilpatrick J.E., 1947
Kilpatrick J.E.,
The thermodynamics and molecular structure of cyclopentane,
J. Am. Chem. Soc., 1947, 69, 2483-2488. [all data]
McCullough J.P., 1959
McCullough J.P.,
Thermodynamics of cyclopentane, methylcyclopentane and 1,cis-3-dimethylcyclopentane: verification of the concept of pseudorotation,
J. Am. Chem. Soc., 1959, 81, 5880-5883. [all data]
Sundaram S., 1963
Sundaram S.,
Thermodynamic functions of some propellants,
Z. Phys. Chem. (Frankfurt), 1963, 36, 376-377. [all data]
Spitzer R., 1946
Spitzer R.,
The heat capacity of gaseous cyclopentane, cyclohexane and methylcyclohexane,
J. Am. Chem. Soc., 1946, 68, 2537-2538. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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