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Benzene, pentamethyl-

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Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis

Quantity Value Units Method Reference Comment
Tboil510. ± 20.KAVGN/AAverage of 10 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus326. ± 3.KAVGN/AAverage of 17 values; Individual data points
Quantity Value Units Method Reference Comment
Deltasub71.60 ± 0.10kJ/molCSabbah, Tabet, et al., 1994ALS
Deltasub71.6 ± 0.1kJ/molCSabbah, Tabet, et al., 1994AC
Deltasub77.4 ± 0.4kJ/molVColomina, Jimenez, et al., 1989see Boned, Colomina, et al., 1964; ALS
Deltasub77.4kJ/molN/AColomina, Jimenez, et al., 1989DRB
Deltasub77.4 ± 0.4kJ/molMEColomina, Jimenez, et al., 1989Based on data from 296. - 313. K.; AC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
57.8353.AStephenson and Malanowski, 1987Based on data from 338. - 503. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
10.67328.2Domalski and Hearing, 1996AC
10.670328.2Eibert, 1944DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
32.5328.2Eibert, 1944DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
6.67296.8Domalski and Hearing, 1996CAL
32.51328.2

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
1.799296.35crystaline, IIcrystaline, IFerry and Thomas, 1933DH
12.343327.45crystaline, IliquidFerry and Thomas, 1933DH
1.979296.8crystaline, IIcrystaline, IHuffman, Parks, et al., 1931DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
6.7296.8crystaline, IIcrystaline, IHuffman, Parks, et al., 1931DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Phase change data, Notes

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

Sabbah, Tabet, et al., 1994
Sabbah, R.; Tabet, D.; Belaadi, S., Enthalpie de sublimation ou vaporisation de quelques derives methyles du benzene, Thermochim. Acta, 1994, 247, 193-199. [all data]

Colomina, Jimenez, et al., 1989
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C., Thermochemical properties of 1,2,4,5-tetramethylbenzene, pentamethylbenzene, and hexamethylbenzene, J. Chem. Thermodyn., 1989, 21, 275-281. [all data]

Boned, Colomina, et al., 1964
Boned, M.L.; Colomina, M.; Perez-Ossorio, R.; Turrion, C., Investigaciones termoquimicas sobre los polimetilbencenos superiores, Anal. Fisc. Quim. B, 1964, 60, 459-468. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Eibert, 1944
Eibert, J., Thesis Washington University (St. Louis), 1944. [all data]

Ferry and Thomas, 1933
Ferry, J.D.; Thomas, S.B., Some heat capacity data for durene, pentamethylbenzene, stilbene, and dibenzyl, J. Phys. Chem., 1933, 37, 253-255. [all data]

Huffman, Parks, et al., 1931
Huffman, H.M.; Parks, G.S.; Barmore, M., Thermal data on organic compounds. X. Further studies on the heat capacities, entropies and free energies of hydrocarbons, J. Am. Chem. Soc., 1931, 53, 3876-3888. [all data]


Notes

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