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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, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
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
Tboil489. ± 2.KAVGN/AAverage of 22 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus263.5 ± 0.3KAVGN/AAverage of 35 out of 45 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple263.57 ± 0.05KAVGN/AAverage of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Tc658.2 ± 0.9KAVGN/AAverage of 10 values; Individual data points
Quantity Value Units Method Reference Comment
Pc18. ± 1.barN/AAmbrose and Tsonopoulos, 1995 
Pc18.10barN/ARosenthal and Teja, 1989Uncertainty assigned by TRC = 0.20 bar; TRC
Pc18.34barN/ATeja, Lee, et al., 1989TRC
Pc18.60barN/APak and Kay, 1972Uncertainty assigned by TRC = 0.1378 bar; corrected for vapor pressure of Hg, and extrapolated to zero time to correct for decomposition; TRC
Pc18.24barN/AAmbrose and Townsend, 1968Uncertainty assigned by TRC = 0.10 bar; TRC
Quantity Value Units Method Reference Comment
Vc0.754l/molN/AAmbrose and Tsonopoulos, 1995 
Quantity Value Units Method Reference Comment
ρc1.3 ± 0.1mol/lN/AAmbrose and Tsonopoulos, 1995 
ρc1.33mol/lN/AAnselme, Gude, et al., 1990Uncertainty assigned by TRC = 0.04 mol/l; TRC
Quantity Value Units Method Reference Comment
Δvap61. ± 1.kJ/molAVGN/AAverage of 12 values; Individual data points
Quantity Value Units Method Reference Comment
Δsub100.2kJ/molBMorawetz, 1972AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
61.4299.CViton, Chavret, et al., 1996AC
58.1334.CViton, Chavret, et al., 1996AC
57.4344.CViton, Chavret, et al., 1996AC
65.7278.N/ASasse, Jose, et al., 1988Based on data from 263. to 371. K.; AC
61.8293.AStephenson and Malanowski, 1987Based on data from 278. to 400. K.; AC
51.6415.A,MMStephenson and Malanowski, 1987Based on data from 400. to 492. K. See also Willingham, Taylor, et al., 1945.; AC
61.1313.GSAllemand, Jose, et al., 1986Based on data from 298. to 389. K.; 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
399.53 to 490.494.105491625.928-92.839Williamham, Taylor, et al., 1945

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
101.7263.BBondi, 1963AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Method Reference Comment
36.836263.59N/AFinke, Gross, et al., 1954DH
35.7263.1DSCMondieig, Rajabalee, et al., 2004AC
36.82263.6N/ADomalski and Hearing, 1996AC
36.581263.5N/AHuffman, Parks, et al., 1931DH

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
139.75263.59Finke, Gross, et al., 1954DH
138.8263.5Huffman, 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:


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.

Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C., Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes, J. Chem. Eng. Data, 1995, 40, 531-546. [all data]

Rosenthal and Teja, 1989
Rosenthal, D.J.; Teja, A.S., The Critical Properties of n-Alkanes Using a Low-Residence Time Flow Apparatus, AIChE J., 1989, 35, 1829. [all data]

Teja, Lee, et al., 1989
Teja, A.S.; Lee, R.J.; Rosenthal, D.J.; Anselme, M.J., Correlation of the Critical Properties of Alkanes and Alkanols in 5th IUPAC Conference on Alkanes and AlkanolsGradisca, 1989. [all data]

Pak and Kay, 1972
Pak, S.C.; Kay, W.B., Gas-Liquid Critical Temperatures of Mixtures. Benzene + n-Alkanes and Hexafluorobenzene + n-Alkanes, Ind. Eng. Chem. Fundam., 1972, 11, 255. [all data]

Ambrose and Townsend, 1968
Ambrose, D.; Townsend, R., Critical Temperatures and Pressures of Some Alkanes, Trans. Faraday Soc., 1968, 64, 2622. [all data]

Anselme, Gude, et al., 1990
Anselme, M.J.; Gude, M.; Teja, A.S., The Critical Temperatures and Densities of the n-Alkanes from Pentane to Octadecane, Fluid Phase Equilib., 1990, 57, 317-26. [all data]

Morawetz, 1972
Morawetz, Ernst, Correlation of sublimation enthalpies at 298.15 K with molecular structure for planar aromatic hydrocarbons, The Journal of Chemical Thermodynamics, 1972, 4, 3, 461-467, . [all data]

Viton, Chavret, et al., 1996
Viton, C.; Chavret, M.; Jose, J., Enthalpies of vaporization of normal alkanes from nonane to pentadecane at temperatures from 298 to 359 K, ELDATA: Int. Electron. J. Phys. Chem. Data, 1996, 2, 3, 103. [all data]

Sasse, Jose, et al., 1988
Sasse, Karim; Jose, Jacques; Merlin, Jean-Claude, A static apparatus for measurement of low vapor pressures. Experimental results on high molecular-weight hydrocarbons, Fluid Phase Equilibria, 1988, 42, 287-304, . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, . [all data]

Willingham, Taylor, et al., 1945
Willingham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D., Vapor pressures and boiling points of some paraffin, alkylcyclopentane, alkylcyclohexane, and alkylbenzene hydrocarbons, J. RES. NATL. BUR. STAN., 1945, 35, 3, 219-17, . [all data]

Allemand, Jose, et al., 1986
Allemand, Nadine; Jose, Jacques; Merlin, J.C., Mesure des pressions de vapeur d'hydrocarbures C10 A C18n-alcanes etn-alkylbenzenes dans le domaine 3-1000 pascal, Thermochimica Acta, 1986, 105, 79-90, . [all data]

Williamham, Taylor, et al., 1945
Williamham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D., Vapor Pressures and Boiling Points of Some Paraffin, Alkylcyclopentane, Alkylcyclohexane, and Alkylbenzene Hydrocarbons, J. Res. Natl. Bur. Stand. (U.S.), 1945, 35, 3, 219-244, . [all data]

Bondi, 1963
Bondi, A., Heat of Siblimation of Molecular Crystals: A Catalog of Molecular Structure Increments., J. Chem. Eng. Data, 1963, 8, 3, 371-381, . [all data]

Finke, Gross, et al., 1954
Finke, H.L.; Gross, M.E.; Waddington, G.; Huffman, H.M., Low-temperature thermal data for the nine normal paraffin hydrocarbons from octane to hexadecane, J. Am. Chem. Soc., 1954, 76, 333-341. [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, . [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, . [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]


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