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p-Xylene

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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, Kenneth Kroenlein director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil411.4 ± 0.5KAVGN/AAverage of 59 out of 65 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus286.4 ± 0.2KAVGN/AAverage of 19 out of 22 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple286.400KN/AMesserly, Finke, et al., 1988Uncertainty assigned by TRC = 0.01 K; TRC
Ttriple286.3KN/AHuffman, Parks, et al., 1930Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Tc617. ± 3.KAVGN/AAverage of 12 values; Individual data points
Quantity Value Units Method Reference Comment
Pc35. ± 2.barAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Vc0.378l/molN/ATsonopoulos and Ambrose, 1995 
Quantity Value Units Method Reference Comment
rhoc2.65 ± 0.02mol/lN/ATsonopoulos and Ambrose, 1995 
rhoc2.661mol/lN/AAkhundov and Imanov, 1970Uncertainty assigned by TRC = 0.05 mol/l; TRC
rhoc2.644mol/lN/ASimon, 1957Uncertainty assigned by TRC = 0.04 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap42. ± 4.kJ/molAVGN/AAverage of 14 values; Individual data points

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
35.67411.5N/AMajer and Svoboda, 1985 
40.3353.N/AHossenlopp and Archer, 1988AC
37.3426.AStephenson and Malanowski, 1987Based on data from 411. - 463. K.; AC
36.1475.AStephenson and Malanowski, 1987Based on data from 460. - 553. K.; AC
36.2566.AStephenson and Malanowski, 1987Based on data from 551. - 616. K.; AC
42.4301.IP,EBStephenson and Malanowski, 1987Based on data from 286. - 453. K. See also Osborn and Douslin, 1974.; AC
36.0 ± 0.1411.CNatarajan and Viswanath, 1985AC
34.5 ± 0.1436.CNatarajan and Viswanath, 1985AC
30.5 ± 0.1484.CNatarajan and Viswanath, 1985AC
24.7 ± 0.1540.CNatarajan and Viswanath, 1985AC
37.3395.N/ACastellari, Francesconi, et al., 1982Based on data from 380. - 410. K.; AC
41.6318.N/AGaw and Swinton, 1968Based on data from 303. - 343. K.; AC
40.1347.MMWillingham, Taylor, et al., 1945Based on data from 332. - 413. K. See also Forziati, Norris, et al., 1949.; AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) beta Tc (K) Reference Comment
298. - 440.58.210.2768616.2Majer and Svoboda, 1985 

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
286.43 - 452.384.145531474.403-55.377Osborn and Douslin, 1974Coefficents calculated by NIST from author's data.
420.00 - 600.004.509441788.91-13.902Ambrose, Broderick, et al., 1967Coefficents calculated by NIST from author's data.
331.44 - 412.444.111381450.688-58.16Williamham, Taylor, et al., 1945 
298. - 333.4.448891644.214-40.229Pitzer and Scott, 1943Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
59.4271.N/AStephenson and Malanowski, 1987Based on data from 247. - 286. K. See also Osborn and Douslin, 1974.; AC
60.8286.BHessler and Lichtenstein, 1986AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
17.11746286.405Messerly, Finke, et al., 1988, 2DH
17.100286.3Corruccini and Ginnings, 1947DH
17.113286.39Pitzer and Scott, 1943DH
17.11286.3Domalski and Hearing, 1996AC
16.933286.3Huffman, Parks, et al., 1930, 2DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
59.77286.405Messerly, Finke, et al., 1988, 2DH
59.73286.3Corruccini and Ginnings, 1947DH
59.75286.39Pitzer and Scott, 1943DH
59.14286.3Huffman, Parks, et al., 1930, 2DH

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.

Messerly, Finke, et al., 1988
Messerly, J.F.; Finke, H.L.; Good, W.D.; Gammon, B.E., Condensed-phase heat capacities and derived thermodynamic properties for 1,4-dimethylbenzene, 1,2-diphenylethane, and 2,3-dimethylnaphthalene, J. Chem. Thermodyn., 1988, 20, 485. [all data]

Huffman, Parks, et al., 1930
Huffman, H.M.; Parks, G.S.; Daniels, A.C., Thermal Data on Organic Compounds: VII The Heat Capacities, Entropies and Free Energies of Twelve Aromatic Hydrocarbons, J. Am. Chem. Soc., 1930, 52, 1547-58. [all data]

Tsonopoulos and Ambrose, 1995
Tsonopoulos, C.; Ambrose, D., Vapor-Liquid Critical Properties of Elements and Compounds. 3. Aromatic Hydrocarbons, J. Chem. Eng. Data, 1995, 40, 547-558. [all data]

Akhundov and Imanov, 1970
Akhundov, T.S.; Imanov, Sh.Yu., Teplofiz. Svoistva Zhidk., 1970, 1970, 48-55. [all data]

Simon, 1957
Simon, M., Methods and Apparatus Used at the Bureau of Physicochemical Standards XV. Critical Constants and Straight-Line Diameters of Ten Hydrocarbons, Bull. Soc. Chim. Belg., 1957, 66, 375-81. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Hossenlopp and Archer, 1988
Hossenlopp, I.A.; Archer, D.G., Enthalpies of vaporization of piperidine and 1,2-dimethylbenzene; gas-phase isobaric heat capacities of piperidine, The Journal of Chemical Thermodynamics, 1988, 20, 9, 1061-1068, https://doi.org/10.1016/0021-9614(88)90112-7 . [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]

Osborn and Douslin, 1974
Osborn, Ann G.; Douslin, Donald R., Vapor-pressure relations for 15 hydrocarbons, J. Chem. Eng. Data, 1974, 19, 2, 114-117, https://doi.org/10.1021/je60061a022 . [all data]

Natarajan and Viswanath, 1985
Natarajan, Govindarajan; Viswanath, Dabir S., Enthalpy of vaporization and vapor pressure of benzene, toluene, p-xylene, and tetralin between 1 and 16 bar, J. Chem. Eng. Data, 1985, 30, 2, 137-140, https://doi.org/10.1021/je00040a001 . [all data]

Castellari, Francesconi, et al., 1982
Castellari, Carlo; Francesconi, Romolo; Comelli, Fabio, Vapor-liquid equilibriums in binary systems containing 1,3-dioxolane at isobaric conditions. 3. Binary mixtures of 1,3-dioxolane with o-, m-, and p-xylenes, J. Chem. Eng. Data, 1982, 27, 2, 156-158, https://doi.org/10.1021/je00028a017 . [all data]

Gaw and Swinton, 1968
Gaw, W.J.; Swinton, F.L., Thermodynamic properties of binary systems containing hexafluorobenzene. Part 4.?Excess Gibbs free energies of the three systems hexafluorobenzene + benzene, touene, and p-xylene, Trans. Faraday Soc., 1968, 64, 2023, https://doi.org/10.1039/tf9686402023 . [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, https://doi.org/10.6028/jres.035.009 . [all data]

Forziati, Norris, et al., 1949
Forziati, Alphonse F.; Norris, William R.; Rossini, Frederick D., Vapor pressures and boiling points of sixty API-NBS hydrocarbons, J. RES. NATL. BUR. STAN., 1949, 43, 6, 555-17, https://doi.org/10.6028/jres.043.050 . [all data]

Ambrose, Broderick, et al., 1967
Ambrose, D.; Broderick, B.E.; Townsend, R., The Vapour Pressures Above the Normal Boiling Point and the Critical Pressures of Some Aromatic Hydrocarbons, J. Chem. Soc. A:, 1967, 633-641, https://doi.org/10.1039/j19670000633 . [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, https://doi.org/10.6028/jres.035.009 . [all data]

Pitzer and Scott, 1943
Pitzer, K.S.; Scott, D.W., The thermodynamics and molecular structure of benzene and its methyl derivatives, J. Am. Chem. Soc., 1943, 65, 803-829. [all data]

Hessler and Lichtenstein, 1986
Hessler, W.; Lichtenstein, W., Wiss. Zeitschr. Wilhelm-Pieck-Univ. Rostock, Naturwiss. Reihe, 1986, 35, 7, 27. [all data]

Messerly, Finke, et al., 1988, 2
Messerly, J.F.; Finke, H.L.; Good, W.D.; Gammon, B.E., Condensed-phase heat capacities and derived thermodynamic properties for 1,4-dimethylbenzene, 1,2-diphenylethane, and 2,3-dimethylnaphthalene, J. Chem. Thermodynam., 1988, 20, 485-501. [all data]

Corruccini and Ginnings, 1947
Corruccini, R.J.; Ginnings, D.C., The enthalpy, entropy and specific heat of liquid p-xylene from 0 to 300°. The heat of fusion, J. Am. Chem. Soc., 1947, 69, 2291-2294. [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]

Huffman, Parks, et al., 1930, 2
Huffman, H.M.; Parks, G.S.; Daniels, A.C., Thermal data on organic compounds. VII. The heat capacities, entropies and free energies of twelve aromatic hydrocarbons, J. Am. Chem. Soc., 1930, 52, 1547-1558. [all data]


Notes

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