Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Phase change data

Go To: Top, References, Notes

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
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
Tboil653.2KN/AWeast and Grasselli, 1989BS
Tboil593.9KN/ATsakalotos, 1906Uncertainty assigned by TRC = 2. K; TRC
Quantity Value Units Method Reference Comment
Tfus320. ± 1.KAVGN/AAverage of 15 out of 16 values; Individual data points
Quantity Value Units Method Reference Comment
Tc790. ± 8.KN/AAmbrose and Tsonopoulos, 1995 
Tc789.7KN/ANikitin, Pavlov, et al., 1994Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Pc9. ± 2.barN/AAmbrose and Tsonopoulos, 1995 
Pc9.15barN/ANikitin, Pavlov, et al., 1994Uncertainty assigned by TRC = 0.40 bar; TRC
Quantity Value Units Method Reference Comment
Deltavap117.kJ/molCGCChickos and Hanshaw, 2004Based on data from 434. - 539. K.; AC
Deltavap118.7 ± 0.1kJ/molGSPuri, Chickos, et al., 2001AC
Deltavap119.7 ± 2.3kJ/molCGCNichols, Orf, et al., 2000AC
Deltavap120.5 ± 2.0kJ/molCGCDikii and Kabo, 1991AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
472.70.004Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
93.5427.N/ASawaya, Mokbel, et al., 2006Based on data from 412. - 462. K.; AC
123. ± 1.393.TEPiacente, Fontana, et al., 1994Based on data from 370. - 416. K.; AC
92.385.TE,ME,GSPiacente, Pompili, et al., 1991Based on data from 370. - 490. K.; AC
110.4329.AStephenson and Malanowski, 1987Based on data from 314. - 353. K.; AC
94.455.A,ESTStephenson and Malanowski, 1987Based on data from 440. - 653. K. See also Kudchadker and Zwolinski, 1966.; AC

Antoine Equation Parameters

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A B C Reference Comment
443. - 639.76.557064200.0691.864Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
52.6320.2DSCMondieig, Rajabalee, et al., 2004AC
53.97320.7N/ADomalski and Hearing, 1990AC
76.700319.7N/ASyunyaev, Tumanyan, et al., 1984Relative error in determination ± 5%.; DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
239.9319.7Syunyaev, Tumanyan, et al., 1984Relative; DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
69.37313.7Domalski and Hearing, 1990CAL

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
21.500313.5crystaline, IIcrystaline, IBarbillon, Schuffenecker, et al., 1991DH
52.250320.8crystaline, IliquidBarbillon, Schuffenecker, et al., 1991DH
21.757313.65crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
53.974320.65crystaline, IliquidSchaerer, Busso, et al., 1955DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
69.4313.65crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
168.3320.65crystaline, 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:


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]

Tsakalotos, 1906
Tsakalotos, D.E., C. R. Hebd. Seances Acad. Sci., 1906, 143, 1235. [all data]

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]

Nikitin, Pavlov, et al., 1994
Nikitin, E.D.; Pavlov, P.A.; Bessonova, N.V., Critical constants of n-alkanes with from 17 to 24 carbon atoms, J. Chem. Thermodyn., 1994, 26, 177-82. [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, . [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, . [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, . [all data]

Dikii and Kabo, 1991
Dikii, V.V.; Kabo, G.Ya., Thermodynamic properties and pseudorotation of cyclopentanone, Dokl. Akad. Nauk SSSR, 1991, 35, 2, 158. [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [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, . [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, . [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, . [all data]

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

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, . [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, 1990
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase Volume II, J. Phys. Chem. Ref. Data, 1990, 19, 4, 881, . [all data]

Syunyaev, Tumanyan, et al., 1984
Syunyaev, Z.I.; Tumanyan, B.P.; Kolesnikov, S.I.; Zhokhova, N.I., Some anomalies in melting points of binary mixtures of solid hydrocarbons, Zhur. Prikl. Khim. (Leningrad), 1984, 57, 666-669. [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]

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]


Go To: Top, Phase change data, References