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Pentane

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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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-35.08 ± 0.14kcal/molCcbGood, 1970ALS
Deltafgas-35.16 ± 0.24kcal/molCmPilcher and Chadwick, 1967ALS
Deltafgas-35.00 ± 0.16kcal/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Deltacgas-844.99 ± 0.23kcal/molCmPilcher and Chadwick, 1967Corresponding «DELTA»fgas = -35.16 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacgas-845.27 ± 0.21kcal/molCcbRossini, 1934Corresponding «DELTA»fgas = -34.88 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
gas83.13 ± 0.20cal/mol*KN/AMesserly G.H., 1940Scott [ Scott D.W., 1974] has calculated the value of S(298.15 K)=349.49(0.71) J/mol*K on the basis of data [ Messerly G.H., 1940].; GT

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
28.697 ± 0.057298.15Kharin V.E., 1985Experimental data [ Sage B.H., 1937] are less accurate than selected ones. Please also see Hossenlopp I.A., 1981.; GT
30.554 ± 0.062323.15
32.481 ± 0.065348.15
34.405 ± 0.069373.15
36.310 ± 0.072398.15
38.162 ± 0.076423.15
40.002 ± 0.079448.15
40.179450.
41.766 ± 0.084473.15
43.494 ± 0.086498.15
43.592500.
45.191 ± 0.091523.15
46.836550.
50.007600.
53.043650.
55.664700.

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
22.36200.Scott D.W., 1974, 2Recommended values were obtained from the consistent correlation scheme for alkanes [ Scott D.W., 1974, Scott D.W., 1974, 2]. This approach gives a better agreement with experimental data than the statistical thermodynamics calculation [ Pitzer K.S., 1944, Pitzer K.S., 1946].; GT
26.900273.15
28.69 ± 0.02298.15
28.829300.
36.460400.
43.640500.
49.900600.
55.301700.
59.900800.
63.800900.
67.2991000.
70.2011100.
72.8011200.
75.0001300.
77.0001400.
79.0011500.

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.

Good, 1970
Good, W.D., The enthalpies of combustion and formation of the isomeric pentanes, J. Chem. Thermodyn., 1970, 2, 237-244. [all data]

Pilcher and Chadwick, 1967
Pilcher, G.; Chadwick, J.D.M., Measurements of heats of combustion by flame calorimetry. Part 4.-n-Pentane, isopentane, neopentane, Trans. Faraday Soc., 1967, 63, 2357-2361. [all data]

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]

Rossini, 1934
Rossini, F.D., Calorimetric determination of the heats of combustion of ethane, propane, normal butane, and normal pentane, J. Res. NBS, 1934, 12, 735-750. [all data]

Messerly G.H., 1940
Messerly G.H., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of n-pentane, J. Am. Chem. Soc., 1940, 62, 2988-2991. [all data]

Scott D.W., 1974
Scott D.W., Correlation of the chemical thermodynamic properties of alkane hydrocarbons, J. Chem. Phys., 1974, 60, 3144-3165. [all data]

Kharin V.E., 1985
Kharin V.E., Isobaric heat capacity of n-pentane in the vapor phase, Izv. Vyssh. Ucheb. Zaved., Neft. Gaz, 1985, 28, 63-66. [all data]

Sage B.H., 1937
Sage B.H., Phase equilibria in hydrocarbon systems. XX. Isobaric heat capacity of gaseous propane, n-butane, isobutane, and n-pentane, Ind. Eng. Chem., 1937, 29, 1309-1314. [all data]

Hossenlopp I.A., 1981
Hossenlopp I.A., Vapor heat capacities and enthalpies of vaporization of five alkane hydrocarbons, J. Chem. Thermodyn., 1981, 13, 415-421. [all data]

Scott D.W., 1974, 2
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]

Pitzer K.S., 1944
Pitzer K.S., Thermodynamics of gaseous paraffins. Specific heat and related properties, Ind. Eng. Chem., 1944, 36, 829-831. [all data]

Pitzer K.S., 1946
Pitzer K.S., The entropies and related properties of branched paraffin hydrocarbons, Chem. Rev., 1946, 39, 435-447. [all data]


Notes

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