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Cyclohexane, ethyl-

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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:
DRB - Donald R. Burgess, Jr.
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-41.25kcal/molN/ABaroody and Carpenter, 1972Value computed using «DELTA»fHliquid° value of -213.0 kj/mol from Baroody and Carpenter, 1972 and «DELTA»vapH° value of 40.4 kj/mol from Prosen, Johnson, et al., 1946.; DRB
Deltafgas-41.05 ± 0.37kcal/molCcbProsen, Johnson, et al., 1946ALS
Quantity Value Units Method Reference Comment
gas91.460cal/mol*KN/AHuffman H.M., 1949GT

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
9.78750.Thermodynamics Research Center, 1997p=1 bar. There is an appreciable difference, mainly at high temperatures, with values estimated earlier by a method of increments [ Beckett C.W., 1947].; GT
14.98100.
20.85150.
26.70200.
35.85273.15
39.17298.15
39.41300.
52.49400.
64.10500.
73.83600.
81.96700.
88.81800.
94.67900.
99.641000.
103.91100.
107.61200.
110.81300.
113.51400.
115.91500.
120.51750.
123.92000.
126.32250.
128.22500.
129.62750.
130.73000.

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
36.384298.15Colgate S.O., 1990These heat capacities determined from acoustical measurements are significantly lower than statistically calculated values [ Thermodynamics Research Center, 1997] (Cp(298.15 K)=163.9 J/mol*K) and values estimated by a method of increments [ Beckett C.W., 1947] (Cp(298.15 K)=158.6 J/mol*K). At the same time, the heat capacities of ethylbenzene determined in this work are only slightly below than calorimetric ones.; GT
40.717323.15
47.299373.15
52.015408.15
57.333448.15

References

Go To: Top, Gas phase thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Baroody and Carpenter, 1972
Baroody, E.E.; Carpenter, G.A., Heats of formation of propellant compounds (U), Rpt. Naval Ordnance Systems Command Task No. 331-003/067-1/UR2402-001 for Naval Ordance Station, Indian Head, MD, 1972, 1-9. [all data]

Prosen, Johnson, et al., 1946
Prosen, E.J.; Johnson, W.H.; Rossini, F.D., Heats of formation and combustion of the normal alkylcyclopentanes and cyclohexanes and the increment per CH2 group for several homologous series of hydrocarbons, J. Res. NBS, 1946, 37, 51-56. [all data]

Huffman H.M., 1949
Huffman H.M., Low-temperature thermal data on eight C8H16 alkylcyclohexanes, J. Am. Chem. Soc., 1949, 71, 584-592. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Beckett C.W., 1947
Beckett C.W., The thermodynamic properties and molecular structure of cyclohexane, methylcyclohexane, ethylcyclohexane, and seven dimethylcyclohexanes, J. Am. Chem. Soc., 1947, 69, 2488-2495. [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]


Notes

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