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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos
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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tfus349.1 ± 0.9KAVGN/AAverage of 26 out of 27 values; Individual data points
Quantity Value Units Method Reference Comment
Deltavap43.69kcal/molCGCChickos and Hanshaw, 2004Based on data from 534. - 565. K.; AC

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
37.5 ± 0.5484.TEPiacente, Fontana, et al., 1994Based on data from 452. - 516. K.; AC
29.73550.A,EStephenson and Malanowski, 1987Based on data from 535. - 571. K. See also Kudchadker and Zwolinski, 1966.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
19.5350.2DSCKhimeche, Boumrah, et al., 2006AC
24.500349.2DSCWang, Tozaki, et al., 2006AC
20.9349.DSCMarti, Kaisersberger, et al., 2004AC
20.9348.9ACWang, Tan, et al., 1999Based on data from 80. - 370. K.; AC
21.23349.2N/ADomalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
6.862345.4Domalski and Hearing, 1996CAL

Enthalpy of phase transition

DeltaHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
2.370345.35crystaline, IIIcrystaline, IICompany, 1973DH
7.3000347.05crystaline, IIcrystaline, ICompany, 1973DH
31.2299349.15crystaline, IliquidCompany, 1973DH
2.370345.25crystaline, IIIcrystaline, IISchaerer, Busso, et al., 1955DH
7.3000346.95crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
21.230349.05crystaline, IliquidSchaerer, Busso, et al., 1955DH

Entropy of phase transition

DeltaStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
6.86345.35crystaline, IIIcrystaline, IICompany, 1973DH
21.0347.05crystaline, IIcrystaline, ICompany, 1973DH
89.44349.15crystaline, IliquidCompany, 1973DH
6.86345.25crystaline, IIIcrystaline, IISchaerer, Busso, et al., 1955DH
21.0346.95crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
60.83349.05crystaline, IliquidSchaerer, Busso, et al., 1955DH

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:


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.

Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William, Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C 31 to C 38 at T = 298.15 K by Correlation Gas Chromatography, J. Chem. Eng. Data, 2004, 49, 3, 620-630, https://doi.org/10.1021/je030236t . [all data]

Piacente, Fontana, et al., 1994
Piacente, Vincenzo; Fontana, Danilo; Scardala, Paolo, Enthalpies of Vaporization of a Homologous Series of n-Alkanes Determined from Vapor Pressure Measurements, J. Chem. Eng. Data, 1994, 39, 2, 231-237, https://doi.org/10.1021/je00014a009 . [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]

Kudchadker and Zwolinski, 1966
Kudchadker, A.P.; Zwolinski, B.J., Vapor Pressure and Boiling Points of Normal Alkanes, C 21 to C 100 ., J. Chem. Eng. Data, 1966, 11, 2, 253-255, https://doi.org/10.1021/je60029a039 . [all data]

Khimeche, Boumrah, et al., 2006
Khimeche, Kamel; Boumrah, Yacine; Benziane, Mokhtar; Dahmani, Abdallah, Solid--liquid equilibria and purity determination for binary n-alkane+naphthalene systems, Thermochimica Acta, 2006, 444, 2, 166-172, https://doi.org/10.1016/j.tca.2006.03.011 . [all data]

Wang, Tozaki, et al., 2006
Wang, Shaolan; Tozaki, Ken-Ichi; Hayashi, Hideko; Inaba, Hideaki; Yamamoto, Hiroko, Observation of multiple phase transitions in some even n-alkanes using a high resolution and super-sensitive DSC, Thermochimica Acta, 2006, 448, 2, 73-81, https://doi.org/10.1016/j.tca.2006.06.022 . [all data]

Marti, Kaisersberger, et al., 2004
Marti, E.; Kaisersberger, E.; Emmerich, W.-D., New aspects of thermal analysis, Part I. Resolution of DSC and means for its optimization, Journal of Thermal Analysis and Calorimetry, 2004, 77, 3, 905-934, https://doi.org/10.1023/B:JTAN.0000041669.06816.36 . [all data]

Wang, Tan, et al., 1999
Wang, Lan; Tan, Zhi-Cheng; Meng, Shuang-He; Liang, Dong-Bai, Low-temperature heat capacity and phase transition of n-hexatriacontane, Thermochimica Acta, 1999, 342, 1-2, 59-65, https://doi.org/10.1016/S0040-6031(99)00308-1 . [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]

Company, 1973
Company, J.C., Measurement and interpretation of crystallization equilibriums of heavy paraffin and aromatic hydrocarbon solutions, Chem. Eng. Sci., 1973, 28, 318-323. [all data]

Schaerer, Busso, et al., 1955
Schaerer, A.A.; Busso, C.J.; Smith, A.E.; Skinner, L.B., Properties of pure normal alkanes in the C17 to C36 range, J. Am. Chem. Soc., 1955, 77, 2017-2019. [all data]


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