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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
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
Tfus386. ± 3.KAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
Δsub97. ± 1.kJ/molVMalaspina, Gigli, et al., 1973ALS
Δsub96.5 ± 0.3kJ/molCMalaspina, Gigli, et al., 1973AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
64.9458.AFerro and Piacente, 1985Based on data from 443. - 578. 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 Comment
392.5 - 578.95.846153308.304-12.776Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
93.6 ± 0.7351.MEMalaspina, Gigli, et al., 1973Based on data from 320. - 384. K.; AC
94.6 ± 0.3351.CMalaspina, Gigli, et al., 1973Based on data from 320. - 384. K.; AC
97.6316.MEHoyer and Peperle, 1958Based on data from 288. - 343. K. See also Cox and Pilcher, 1970.; AC
97.5 ± 4.2288.VHoyer and Peperle, 1958, 2Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 95.0 kJ/mol; ALS
88.7 ± 2.5332. - 341.N/AWolf and Weghofer, 1938See also Jones, 1960 and Trieschmann, 1935.; AC
89. ± 2.342.VWolf and Weghofer, 1938, 2ALS
88.3 ± 1.7332. - 341.TEWolf and Trieschmann, 1934AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
23.689387.Singh, Gupta, et al., 1990DH
23.68387.2Domalski and Hearing, 1996AC
23.600384.95Booss and Hauschildt, 1972DH
23.680385.0Andrews, Lynn, et al., 1926DH

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
61.3384.95Booss and Hauschildt, 1972DH
61.5385.0Andrews, Lynn, et al., 1926DH

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.

Malaspina, Gigli, et al., 1973
Malaspina, L.; Gigli, R.; Bardi, G.; De Maria, G., Simultaneous determination by Knudsen effusion microcalorimetry of the vapour pressure and the enthalpy of sublimation of p- and m-nitroaniline, J. Chem. Thermodyn., 1973, 5, 699-706. [all data]

Ferro and Piacente, 1985
Ferro, D.; Piacente, V., Heat of vaporization of o-, m- and p-nitroaniline, Thermochimica Acta, 1985, 90, 387-389, https://doi.org/10.1016/0040-6031(85)87121-5 . [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]

Hoyer and Peperle, 1958
Hoyer, H.; Peperle, W., Z. Elektrochem., 1958, 62, 61. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]

Hoyer and Peperle, 1958, 2
Hoyer, H.; Peperle, W., Dampfdrunkmessungen an organischen substanzen und ihre sublimationswarmen, Z. Electrochem., 1958, 62, 61-66. [all data]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

Wolf and Weghofer, 1938
Wolf, K.L.; Weghofer, H.Z., Z. Phys. Chem. Abt. B, 1938, 39, 194. [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

Trieschmann, 1935
Trieschmann, H.G., , Ph.D. Dissertation, Inst. Fur Phys. Chem. and Electrochem. der Universitat Kiel, Germany, 1935. [all data]

Wolf and Weghofer, 1938, 2
Wolf, K.L.; Weghofer, H., Uber sublimationswarmen, Z. Phys. Chem., 1938, 39, 194-208. [all data]

Wolf and Trieschmann, 1934
Wolf, K.L.; Trieschmann, H.G., Z. Phys. Chem. Abt. B, 1934, 27, 376. [all data]

Singh, Gupta, et al., 1990
Singh, R.N.; Gupta, J.P.; Singh, N.; Singh, N.P.; Singh, O.P.; Singh, N.B.; Hopkins, R.H.; Mazelsky, R., Growth conditions of organic non-linear optical crystals, Thermochim. Acta, 1990, 165(2), 297-299. [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]

Booss and Hauschildt, 1972
Booss, H.J.; Hauschildt, K.R., Die Schmelzenthalpie des Benzils und 4-Nitrophenols, Z. Anal. Chem., 1972, 261(1), 32. [all data]

Andrews, Lynn, et al., 1926
Andrews, D.H.; Lynn, G.; Johnston, J., The heat capacities and heat of crystallization of some isomeric aromatic compounds, J. Am. Chem. Soc., 1926, 48, 1274-1287. [all data]


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