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Heptane, 2-methyl-

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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-215.5 ± 1.3kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
gas459.49 ± 0.88J/mol*KN/AMesserly J.F., 1971GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
186.13298.15Colgate S.O., 1990GT
202.07323.15
230.06373.15
248.37408.15
265.52448.15

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
135.65200.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
173.89273.15
187.2 ± 0.2298.15
188.20300.
241.25400.
288.78500.
329.28600.
363.17700.
391.62800.
416.31900.
436.811000.
454.801100.
470.701200.
485.341300.
497.901400.
510.451500.

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 - 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-255.2 ± 1.3kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Deltacliquid-5465.5 ± 1.2kJ/molCcbProsen and Rossini, 1945Corresponding «DELTA»fliquid = -255.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-5447.1kJ/molCcbFajans, 1920Corresponding «DELTA»fliquid = -273. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-5274.6kJ/molCcbRichards and Jesse, 1910At 293 K; Corresponding «DELTA»fliquid = -446.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid356.39J/mol*KN/AMesserly and Finke, 1971DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
252.00298.15Messerly and Finke, 1971T = 11 to 370 K.; DH
251.58298.15Osborne and Ginnings, 1947T = 283 to 318 K.; DH

Reaction 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Octane = Heptane, 2-methyl-

By formula: C8H18 = C8H18

Quantity Value Units Method Reference Comment
Deltar-5.23 ± 0.92kJ/molCisoProsen and Rossini, 1945, 2liquid phase; Calculated from «DELTA»Hc

Hydrogen + 1-Heptene, 2-methyl- = Heptane, 2-methyl-

By formula: H2 + C8H16 = C8H18

Quantity Value Units Method Reference Comment
Deltar-115.1 ± 0.7kJ/molChydRogers, Dejroongruang, et al., 1992liquid phase; solvent: Cyclohexane

Hydrogen + 1-Heptene, 6-methyl- = Heptane, 2-methyl-

By formula: H2 + C8H16 = C8H18

Quantity Value Units Method Reference Comment
Deltar-126.4 ± 2.0kJ/molChydRogers, Dejroongruang, et al., 1992liquid phase; solvent: Cyclohexane

Heptane, 2-methyl- = Heptane, 3-methyl-

By formula: C8H18 = C8H18

Quantity Value Units Method Reference Comment
Deltar1.86 ± 0.42kJ/molEqkRoganov, Kabo, et al., 1972gas phase; At 1368 K

Heptane, 2-methyl- = Heptane, 4-methyl-

By formula: C8H18 = C8H18

Quantity Value Units Method Reference Comment
Deltar1.3 ± 0.4kJ/molEqkRoganov, Kabo, et al., 1972gas phase; At 368 K

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction 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]

Messerly J.F., 1971
Messerly J.F., Low-temperature thermal properties of 2-methylheptane and 2-methyldecane: the thermodynamic properties of 2-methylalkanes, J. Chem. Thermodyn., 1971, 3, 675-687. [all data]

Colgate S.O., 1990
Colgate S.O., Acoustical determination of ideal gas heat capacities of three C-8 compounds, Fluid Phase Equilib., 1990, 60, 191-203. [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]

Fajans, 1920
Fajans, K., Die Energie der Atombindungen im Diamanten und in aliphatischen Kohlenwasserstoffen, Ber., 1920, 53, 643-665. [all data]

Richards and Jesse, 1910
Richards, T.W.; Jesse, R.H., Jr., The heats of combustion of the octanes and xylenes, J. Am. Chem. Soc., 1910, 32, 268-298. [all data]

Messerly and Finke, 1971
Messerly, J.F.; Finke, H.L., Low-temperature thermal properties of 2-methylheptane and 2-methyldecane: the thermodynamic properties of the 2-methylalkanes, J. Chem. Thermodynam., 1971, 3, 675-687. [all data]

Osborne and Ginnings, 1947
Osborne, N.S.; Ginnings, D.C., Measurements of heat of vaporization and heat capacity of a number of hydrocarbons, J. Res. NBS, 1947, 39, 453-477. [all data]

Prosen and Rossini, 1945, 2
Prosen, E.J.; Rossini, F.D., Heats of isomerization of the 18 octanes, J. Res. NBS, 1945, 34, 163-174. [all data]

Rogers, Dejroongruang, et al., 1992
Rogers, D.W.; Dejroongruang, K.; Samuel, S.D.; Fang, W.; Zhao, Y., Enthalpies of hydrogenation of the octenes and the methylheptenes, J. Chem. Thermodyn., 1992, 24, 561-565. [all data]

Roganov, Kabo, et al., 1972
Roganov, G.N.; Kabo, G.Ya.; Andreevskii, D.N., Thermodynamics of the isomerization of methylpentanes and methylheptanes, Neftekhimiya, 1972, 12, 495-500. [all data]


Notes

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