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Butane, 2,2-dimethyl-

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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-185.6 ± 0.96kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
gas358.65 ± 0.84J/mol*KN/AKilpatrick J.E., 1946The entropy values S(296.05 K)=357.19 and S(322.85 K)=369.87 J/mol*K were calculated by [ Scott D.W., 1974] from the experimental data [ Douslin D.R., 1946].; GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
101.46200.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., 1946] (see also [ Waddington G., 1949]).; GT
131.08273.15
141.5 ± 0.3298.15
142.26300.
183.13400.
220.33500.
253.13600.
281.58700.
306.69800.
328.44900.
348.111000.
365.261100.
380.331200.
393.301300.
405.851400.
418.401500.

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
159.41 ± 0.32341.55Waddington G., 1947GT
164.22 ± 0.33353.20
173.64 ± 0.35376.05
188.07 ± 0.38412.40
202.21 ± 0.40449.40

References

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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]

Kilpatrick J.E., 1946
Kilpatrick J.E., The thermodynamics of 2,2-dimethylbutane, including the heat capacity, heats of transition, fusion and vaporization and the entropy, J. Am. Chem. Soc., 1946, 68, 1066-1072. [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]

Douslin D.R., 1946
Douslin D.R., Low-temperature thermal data on the five isomeric hexanes, J. Am. Chem. Soc., 1946, 68, 1704-1708. [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., 1946
Pitzer K.S., The entropies and related properties of branched paraffin hydrocarbons, Chem. Rev., 1946, 39, 435-447. [all data]

Waddington G., 1949
Waddington G., Experimental vapor heat capacities and heats of vaporization of 2-methylpentane, 3-methylpentane, and 2,3-dimethylbutane, J. Am. Chem. Soc., 1949, 71, 3902-3906. [all data]

Waddington G., 1947
Waddington G., Experimental vapor heat capacities and heats of vaporization of n-hexane and 2,2-dimethylbutane, J. Am. Chem. Soc., 1947, 69, 2275-2279. [all data]


Notes

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