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Butane, 2-methyl-

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Condensed 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 - H.Y. Afeefy, J.F. Liebman, and S.E. Stein
DH - E.S. Domalski and E.D. Hearing

Quantity Value Units Method Reference Comment
Deltafliquid-178.2 ± 0.88kJ/molCcbGood, 1970Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -178.9 ± 0.59 kJ/mol; ALS
Deltafliquid-179.3 ± 0.84kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Deltacliquid-3504.4 ± 0.84kJ/molCcbGood, 1970Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -3503.6 ± 0.46 kJ/mol; Corresponding «DELTA»fliquid = -178.2 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-3503.3 ± 0.75kJ/molCcbProsen and Rossini, 1945Corresponding «DELTA»fliquid = -179.3 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid260.41J/mol*KN/AGuthrie and Huffman, 1943DH
liquid261.04J/mol*KN/ASchumann, Aston, et al., 1942DH
liquid254.4J/mol*KN/AParks, Huffman, et al., 1930Extrapolation below 90 K, 57.49 J/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
164.5298.3Czarnota, 1988T = 289 to 299 K. p = 0.1 MPa. Unsmoothed experimental datum. Cp values provided over the pressure range 0.1 to 820 MPa.; DH
164.85298.15Guthrie and Huffman, 1943T = 13 to 300 K.; DH
169.41290.Schumann, Aston, et al., 1942T = 20 to 290 K.; DH
157.3275.8Parks, Huffman, et al., 1930T = 80 to 276 K. Value is unsmoothed experimental datum.; DH

References

Go To: Top, 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.

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

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [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]

Guthrie and Huffman, 1943
Guthrie, G.B., Jr.; Huffman, H.M., Thermal data. XVI. The heat capacity and entropy of isopentane. The absence of a reported anomaly, J. Am. Chem. Soc., 1943, 65, 1139-1143. [all data]

Schumann, Aston, et al., 1942
Schumann, S.C.; Aston, J.G.; Sagenkahn, M., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressures of isopentane, J. Am. Chem. Soc., 1942, 64, 1039-1043. [all data]

Parks, Huffman, et al., 1930
Parks, G.S.; Huffman, H.M.; Thomas, S.B., Thermal data on organic compounds. VI. The heat capacities, entropies and free energies of some saturated, non-benzenoid hydrocarbons, J. Am. Chem. Soc., 1930, 52, 1032-1041. [all data]

Czarnota, 1988
Czarnota, I., Heat capacity of 2-methylbutane at high pressures, J. Chem. Thermodynam., 1988, 20, 457-462. [all data]


Notes

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