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Pentacosane

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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
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
Tboil675.1KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Tfus327. ± 2.KAVGN/AAverage of 16 values; Individual data points
Quantity Value Units Method Reference Comment
Deltavap126.8kJ/molCGCChickos and Hanshaw, 2004Based on data from 434. - 539. K.; AC
Deltavap128.6 ± 2.2kJ/molGSPuri, Chickos, et al., 2001AC
Deltavap127.6 ± 0.8kJ/molCGCNichols, Orf, et al., 2000AC
Deltavap129.8 ± 2.9kJ/molCGCChickos and Wilson, 1997AC
Quantity Value Units Method Reference Comment
Deltasub174. ± 10.kJ/molBPiacente, Pompili, et al., 1991AC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
106.6397.N/ASawaya, Mokbel, et al., 2006Based on data from 382. - 462. K.; AC
126. ± 1.415.TEPiacente, Fontana, et al., 1994Based on data from 397. - 434. K.; AC
97.6405.TE,ME,GSPiacente, Pompili, et al., 1991Based on data from 390. - 531. K.; AC
90.9 ± 5.7479.GSPiacente and Scardala, 1990Based on data from 461. - 498. K.; AC
99.2472.A,ESTStephenson and Malanowski, 1987Based on data from 457. - 675. K. See also Kudchadker and Zwolinski, 1966.; AC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
467.4 - 663.46.650734317.287-14.252Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
79.391326.6N/ASpaght, Thomas, et al., 1932DH
55.53325.9DSCKhimeche, Boumrah, et al., 2006AC
57.8326.4DSCMondieig, Rajabalee, et al., 2004AC
57.74326.7N/ADomalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
243.1326.6Spaght, Thomas, et al., 1932DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
81.42320.2Domalski and Hearing, 1996CAL
176.76326.7

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
26.500320.0crystaline, IIcrystaline, IBarbillon, Schuffenecker, et al., 1991DH
56.750326.7crystaline, IliquidBarbillon, Schuffenecker, et al., 1991DH
25.235319.85crystaline, IIcrystaline, IClaudy, Letoffe, et al., 1979DH
56.605326.25crystaline, IliquidClaudy, Letoffe, et al., 1979DH
26.066320.15crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
57.739326.65crystaline, IliquidSchaerer, Busso, et al., 1955DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
78.9319.85crystaline, IIcrystaline, IClaudy, Letoffe, et al., 1979DH
173.5326.25crystaline, IliquidClaudy, Letoffe, et al., 1979DH
81.4320.15crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
176.8326.65crystaline, 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:


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.

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William, Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C 21 to C 30 at T = 298.15 K by Correlation Gas Chromatography, J. Chem. Eng. Data, 2004, 49, 1, 77-85, https://doi.org/10.1021/je0301747 . [all data]

Puri, Chickos, et al., 2001
Puri, Swati; Chickos, James S.; Welsh, William J., Determination of Vaporization Enthalpies of Polychlorinated Biphenyls by Correlation Gas Chromatography, Anal. Chem., 2001, 73, 7, 1480-1484, https://doi.org/10.1021/ac001246p . [all data]

Nichols, Orf, et al., 2000
Nichols, Gary; Orf, Jennifer; Reiter, Sarah M.; Chickos, James; Gokel, George W., The vaporization enthalpies of some crown and polyethers by correlation gas chromatography, Thermochimica Acta, 2000, 346, 1-2, 15-28, https://doi.org/10.1016/S0040-6031(99)00405-0 . [all data]

Chickos and Wilson, 1997
Chickos, James S.; Wilson, Joe A., Vaporization Enthalpies at 298.15 K of the n -Alkanes from C 21 to C 28 and C 30, J. Chem. Eng. Data, 1997, 42, 1, 190-197, https://doi.org/10.1021/je960089h . [all data]

Piacente, Pompili, et al., 1991
Piacente, Vincenzo; Pompili, Tiziano; Scardala, Paolo; Ferro, Daniela, Temperature dependence of the vaporization enthalpies of n-alkanes from vapour-pressure measurements, The Journal of Chemical Thermodynamics, 1991, 23, 4, 379-396, https://doi.org/10.1016/S0021-9614(05)80092-8 . [all data]

Sawaya, Mokbel, et al., 2006
Sawaya, Terufat; Mokbel, Ilham; Ainous, Nédal; Rauzy, Evelyne; Berro, Charles; Jose, Jacques, Experimental Vapor Pressures of Six n -Alkanes (C 21 , C 23 , C 25 , C 27 , C 29 , C 30 ) in the Temperature Range between 350 K and 460 K, J. Chem. Eng. Data, 2006, 51, 3, 854-858, https://doi.org/10.1021/je050182i . [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]

Piacente and Scardala, 1990
Piacente, Vincenzo; Scardala, Paolo, Vaporization enthalpies and entropies of some n-alkanes, Thermochimica Acta, 1990, 159, 193-200, https://doi.org/10.1016/0040-6031(90)80108-B . [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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Spaght, Thomas, et al., 1932
Spaght, M.E.; Thomas, S.B.; Parks, G.S., Some heat capacity data on organic compounds obtained with a radiation calorimeter, J. Phys. Chem., 1932, 36, 882-888. [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]

Mondieig, Rajabalee, et al., 2004
Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J.; Cuevas-Diarte, M.A., n -Alkane Binary Molecular Alloys, Chem. Mater., 2004, 16, 5, 786-798, https://doi.org/10.1021/cm031169p . [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]

Barbillon, Schuffenecker, et al., 1991
Barbillon, P.; Schuffenecker, L.; Dellacherie, J.; Balesdent, D.; Dirande, M., Variation d'enthalpie subie de 260 K a 340 K par les n-paraffines, comprises entrel'octadecane et l'hexacosane, J. Chim. Phys. Phys.-Chim. Biol., 1991, 88, 91-113. [all data]

Claudy, Letoffe, et al., 1979
Claudy, P.; Letoffe, J.M.; Bousquet, J., Use of a transitory-state flow calorimeter for determining transition enthalpies and calorific capacities, Journ. Calorim. Anal. Therm.(Prepr.), 1979, 10, AD. [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]


Notes

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