Pentane, 2,4-dimethyl-
- Formula: C7H16
- Molecular weight: 100.2019
- IUPAC Standard InChIKey: BZHMBWZPUJHVEE-UHFFFAOYSA-N
- CAS Registry Number: 108-08-7
- 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: 2,4-Dimethylpentane
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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 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 | -202.1 ± 0.96 | kJ/mol | Ccb | Prosen and Rossini, 1945 | ALS |
ΔfH°gas | -205.1 | kJ/mol | N/A | Davies and Gilbert, 1941 | Value computed using ΔfHliquid° value of -238.0±1.0 kj/mol from Davies and Gilbert, 1941 and ΔvapH° value of 32.9 kj/mol from Prosen and Rossini, 1945.; DRB |
Quantity | Value | Units | Method | Reference | Comment |
S°gas | 396.73 | J/mol*K | N/A | Huffman H.M., 1961 | GT |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
115.44 | 200. | Scott D.W., 1974 | Recommended values were obtained from the consistent correlation scheme for alkanes [ Scott D.W., 1974, 2, Scott D.W., 1974]. This approach gives a good agreement with experimental data available for alkanes. However, large uncertainties could be expected at high temperatures.; GT |
157.57 | 273.15 | ||
170.8 ± 0.4 | 298.15 | ||
171.71 | 300. | ||
220.08 | 400. | ||
261.37 | 500. | ||
296.23 | 600. | ||
326.35 | 700. | ||
352.29 | 800. | ||
374.47 | 900. | ||
394.13 | 1000. | ||
411.29 | 1100. | ||
426.35 | 1200. | ||
439.32 | 1300. | ||
451.87 | 1400. | ||
464.42 | 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.
Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D.,
Heats of combustion and formation of the paraffin hydrocarbons at 25° C,
J. Res. NBS, 1945, 263-267. [all data]
Davies and Gilbert, 1941
Davies, G.F.; Gilbert, E.C.,
Heats of combustion and formation of the nine isomeric heptanes in the liquid state,
J. Am. Chem. Soc., 1941, 63, 2730-2732. [all data]
Huffman H.M., 1961
Huffman H.M.,
Low temperature thermodynamic properties of six isomeric heptanes,
J. Phys. Chem., 1961, 65, 495-503. [all data]
Scott D.W., 1974
Scott D.W.,
Chemical Thermodynamic Properties of Hydrocarbons and Related Substances. Properties of the Alkane Hydrocarbons, C1 through C10 in the Ideal Gas State from 0 to 1500 K. U.S. Bureau of Mines, Bulletin 666, 1974. [all data]
Scott D.W., 1974, 2
Scott D.W.,
Correlation of the chemical thermodynamic properties of alkane hydrocarbons,
J. Chem. Phys., 1974, 60, 3144-3165. [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 ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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