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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-44.35 ± 0.23kcal/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
gas85.72 ± 0.20cal/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 (cal/mol*K) Temperature (K) Reference Comment
24.250200.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
31.329273.15
33.81 ± 0.07298.15
34.001300.
43.769400.
52.660500.
60.500600.
67.299700.
73.301800.
78.499900.
83.2001000.
87.2991100.
90.9011200.
94.0011300.
97.0001400.
100.001500.

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
38.100 ± 0.076341.55Waddington G., 1947GT
39.250 ± 0.079353.20
41.501 ± 0.084376.05
44.950 ± 0.091412.40
48.329 ± 0.096449.40

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
Deltafliquid-51.01 ± 0.23kcal/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Deltacliquid-991.52 ± 0.21kcal/molCcbProsen and Rossini, 1945Corresponding «DELTA»fliquid = -50.99 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid65.010cal/mol*KN/ADouslin and Huffman, 1946DH
liquid65.13cal/mol*KN/AKilpatrick and Pitzer, 1946DH
liquid64.39cal/mol*KN/AStull, 1937Extrapolation below 90 K, 17.76 cal/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
45.332298.15Ohnishi, Fujihara, et al., 1989DH
45.860298.15Costas, Huu, et al., 1988DH
45.860298.15Perez-Casas, Aicart, et al., 1988DH
45.277298.15Benson and D'Arcy, 1986DH
45.206298.15Aicart, Kumaran, et al., 1983DH
45.206298.15Benson, D'Arcy, et al., 1983DH
45.77300.Auerbach, Sage, et al., 1950T = 300 to 366 K. Cp given as 0.5312 Btu/lb*R at 80°F.; DH
45.110298.15Douslin and Huffman, 1946T = 13 to 300 K.; DH
44.67290.Kilpatrick and Pitzer, 1946T = 20 to 290 K.; DH
43.781298.1Stull, 1937T = 90 to 320 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.

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]

Douslin and Huffman, 1946
Douslin, D.R.; Huffman, H.M., Low-temperature thermal data on the five isometric hexanes, J. Am. Chem. Soc., 1946, 68, 1704-1708. [all data]

Kilpatrick and Pitzer, 1946
Kilpatrick, J.E.; Pitzer, K.S., The thermodynamics of 2,2-dimethylbutane, including the heat capacity, heats of transitions, fusion and vaporization and the entropy, J. Am. Chem. Soc., 1946, 68, 1066-1072. [all data]

Stull, 1937
Stull, D.R., A semi-micro calorimeter for measuring heat capacities at low temperatures, J. Am. Chem. Soc., 1937, 59, 2726-2733. [all data]

Ohnishi, Fujihara, et al., 1989
Ohnishi, K.; Fujihara, I.; Murakami, S., Thermodynamic properties of decalins mixed with hexane isomers at 298.15K. 1. Excess enthalpies and excess isobaric heat capacities, Fluid Phase Equilib., 1989, 46, 59-72. [all data]

Costas, Huu, et al., 1988
Costas, M.; Huu, V.T.; Patterson, D.; Caceres-Alonso, M.; Tardajos, G.; Aicart, E., Liquid structure and second-order mixing functions for l-chloronaphthalene with linear and branched alkanes, J. Chem. Soc., Faraday Trans., 1988, 1 84(5), 1603-1616. [all data]

Perez-Casas, Aicart, et al., 1988
Perez-Casas, S.; Aicart, E.; Trojo, L.M.; Costas, M., Excess heat capacity. Chlorobenzene-2,2,4,4,6,8,8-heptamethylnonane, Int. Data Ser., Sel. Data Mixtures, 1988, (2)A, 123. [all data]

Benson and D'Arcy, 1986
Benson, G.C.; D'Arcy, P.J., Heat capacities of binary mixtures of n-octane with each of the hexane isomers at 298.15 K, Can. J. Chem., 1986, 64, 2139-2141. [all data]

Aicart, Kumaran, et al., 1983
Aicart, E.; Kumaran, M.K.; Halpin, C.J.; Benson, G.C., Ultrasonic speeds and isentropic compressibilities of 2-methylpentan-1-ol with hexane isomers at 298.15 K, J. Chem. Thermodynam., 1983, 15, 1189-1197. [all data]

Benson, D'Arcy, et al., 1983
Benson, G.C.; D'Arcy, P.J.; Sugamori, M.E., Heat capacities of binary mixtures of 1-hexanol with hexane isomers at 298.15 K, Thermochim. Acta, 1983, 71, 161-166. [all data]

Auerbach, Sage, et al., 1950
Auerbach, C.E.; Sage, B.H.; Lacey, W.N., Isobaric heat capacities at bubble point, Ind. Eng. Chem., 1950, 42, 110-113. [all data]


Notes

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