Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Pentane, 2,2,4,4-tetramethyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-57.71 ± 0.35kcal/molCmFuchs and Peacock, 1979ALS
Quantity Value Units Method Reference Comment
gas102.81cal/mol*KN/AFinke H.L., 1976GT

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
36.740200.Scott D.W., 1974Recommended 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
47.550273.15
51.3 ± 0.2298.15
51.570300.
66.099400.
79.161500.
90.600600.
100.50700.
109.10800.
116.80900.
123.501000.
129.401100.
134.701200.
139.001300.
144.001400.
148.001500.

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, 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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Deltacliquid-1462.2kcal/molCcbShtekher, Skuratov, et al., 1959Corresponding «DELTA»fliquid = -67.4 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-1462.4kcal/molCcbSkuratov, Kozina, et al., 1958Corresponding «DELTA»fliquid = -67.2 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-1462.69 ± 0.31kcal/molCcbJohnson, Prosen, et al., 1947Corresponding «DELTA»fliquid = -66.92 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid79.30cal/mol*KN/AFinke, Messerly, et al., 1976DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
63.65298.15Finke, Messerly, et al., 1976T = 10 to 400 K.; DH

References

Go To: Top, Gas phase thermochemistry data, 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.

Fuchs and Peacock, 1979
Fuchs, R.; Peacock, L.A., Heats of vaporization and gaseous heats of formation of some five- and six-membered ring alkenes, Can. J. Chem., 1979, 57, 2302-2304. [all data]

Finke H.L., 1976
Finke H.L., Low-temperature thermal quantities for five alkyl-substituted pentanes, J. Chem. Thermodyn., 1976, 8, 965-983. [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]

Shtekher, Skuratov, et al., 1959
Shtekher, S.M.; Skuratov, S.M.; Daukshas, V.K.; Levina, R.Ya., Heats of combustion of some branched alkanes, Dokl. Akad. Nauk SSSR, 1959, 127, 812-814. [all data]

Skuratov, Kozina, et al., 1958
Skuratov, S.M.; Kozina, M.P.; Shtocher, S.M.; Prevalova, N.M.; Kamkina, L.S.; Zuko, V.D., Heats of combustion of cyclic compounds, Bull. Chem. Thermodyn., 1958, 1, 21. [all data]

Johnson, Prosen, et al., 1947
Johnson, W.H.; Prosen, E.J.; Rossini, F.D., Heats of combustion and isomerization of six nonanes, J. Res. NBS, 1947, 38, 419-422. [all data]

Finke, Messerly, et al., 1976
Finke, H.L.; Messerly, J.F.; Douslin, D.R., Low-temperature thermal quantities for five alkyl-substituted pentanes, J. Chem. Thermodynam., 1976, 8, 965-983. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References