p-Xylene
- Formula: C8H10
- Molecular weight: 106.1650
- IUPAC Standard InChIKey: URLKBWYHVLBVBO-UHFFFAOYSA-N
- CAS Registry Number: 106-42-3
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Other names: Benzene, 1,4-dimethyl-; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; NSC 72419; UN 1307; 1,4-dimethyl-benzene ( p-xylene)
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Condensed phase thermochemistry 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:
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 |
---|---|---|---|---|---|
ΔfH°liquid | -5.84 ± 0.24 | kcal/mol | Ccb | Prosen, Johnson, et al., 1946 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -1087.82 ± 0.12 | kcal/mol | Cm | Coops, Mulder, et al., 1946 | Reanalyzed by Cox and Pilcher, 1970, Original value = -1086.94 ± 0.12 kcal/mol; Corresponding ΔfHºliquid = -6.16 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1088.16 ± 0.22 | kcal/mol | Ccb | Prosen, Johnson, et al., 1946 | Corresponding ΔfHºliquid = -5.82 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1087.9 | kcal/mol | Ccb | Richards and Barry, 1915 | At 291 K; Corresponding ΔfHºliquid = -6.09 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1091.3 | kcal/mol | Ccb | Richards and Jesse, 1910 | At 293 K; Corresponding ΔfHºliquid = -2.70 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 59.0712 | cal/mol*K | N/A | Messerly, Finke, et al., 1988 | DH |
S°liquid | 58.200 | cal/mol*K | N/A | Pitzer and Scott, 1943 | DH |
S°liquid | 60.49 | cal/mol*K | N/A | Huffman, Parks, et al., 1930 | Extrapolation below 90 K, 65.19 J/mol*K.; DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
43.5514 | 298.15 | Messerly, Finke, et al., 1988 | T = 10 to 400 K.; DH |
43.893 | 298.15 | Tardajos, Aicart, et al., 1986 | DH |
43.4840 | 298.15 | Fortier and Benson, 1979 | DH |
43.48 | 298.15 | Ott, Goates, et al., 1979 | T = 288.15 to 328.15 K.; DH |
43.4498 | 298.15 | Fortier and Benson, 1977 | DH |
43.391 | 298.15 | Wilhelm, Grolier, et al., 1977 | DH |
43.43 | 298.15 | Hyder Khan and Subrahmanyam, 1971 | T = 298; 313 K.; DH |
47.49 | 336. | Swietoslawski and Zielenkiewicz, 1958 | Mean value 21 to 106 C.; DH |
43.40 | 298. | Corruccini and Ginnings, 1947 | T = 273 to 573 K.; DH |
44.19 | 298. | Kurbatov, 1947 | T = 15 to 132 C, mean Cp, three temperatures.; DH |
43.920 | 298.15 | Pitzer and Scott, 1943 | T = 14 to 360 K.; DH |
43.09 | 299.0 | Huffman, Parks, et al., 1930 | T = 92 to 299 K. Value is unsmoothed experimental datum.; DH |
42.21 | 303. | Willams and Daniels, 1924 | T = 303 to 348 K. Equation only.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Prosen, Johnson, et al., 1946
Prosen, E.J.; Johnson, W.H.; Rossini, F.D.,
Heats of combustion and formation at 25°C of the alkylbenzenes through C10H14, and of the higher normal monoalkylbenzenes,
J. Res. NBS, 1946, 36, 455-461. [all data]
Coops, Mulder, et al., 1946
Coops, J.; Mulder, D.; Dienske, J.W.; Smittenberg, J.,
The heats of combustion of a number of hydrocarbons,
Rec. Trav. Chim. Pays/Bas, 1946, 65, 128. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Richards and Barry, 1915
Richards, T.W.; Barry, F.,
The heats of combustion of aromatic hydrocarbons and hexamethylene,
J. Am. Chem. Soc., 1915, 37, 993-1020. [all data]
Richards and Jesse, 1910
Richards, T.W.; Jesse, R.H., Jr.,
The heats of combustion of the octanes and xylenes,
J. Am. Chem. Soc., 1910, 32, 268-298. [all data]
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. Thermodynam., 1988, 20, 485-501. [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]
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, 1547-1558. [all data]
Tardajos, Aicart, et al., 1986
Tardajos, G.; Aicart, E.; Costas, M.; Patterson, D.,
Liquid structure and second-order mixing functions for benzene, toluene, and p-xylene with n-alkanes, J. Chem. Soc.,
Faraday Trans., 1986, 1 82, 2977-2987. [all data]
Fortier and Benson, 1979
Fortier, J.-L.; Benson, G.C.,
Heat capacities of some binary aromatic hydrocarbon mixtures containing benzene or toluene,
J. Chem. Eng. Data, 1979, 24(1), 34-37. [all data]
Ott, Goates, et al., 1979
Ott, J.B.; Goates, J.R.; Grigg, R.B.,
Excess volumes, enthalpies, and Gibbs free energies for mixtures of benzenes + p-xylene,
J. Chem. Thermodynam., 1979, 11, 1167-1173. [all data]
Fortier and Benson, 1977
Fortier, J.-L.; Benson, G.C.,
Excess heat capacities of binary mixtures of tetrachloromethane witlh some aromatic liquids at 298.15 K,
J. Chem. Thermodynam., 1977, 9, 1181-1188. [all data]
Wilhelm, Grolier, et al., 1977
Wilhelm, E.; Grolier, J.-P.E.; Karbalai Ghassemi, M.H.,
Molar heat capacities of binary liquid mixtures: 1,2-dichloroethane + benzene, + toluene, and + p-xylene,
Ber. Bunsenges. Phys. Chem., 1977, 81, 925-930. [all data]
Hyder Khan and Subrahmanyam, 1971
Hyder Khan, V.; Subrahmanyam, S.V.,
Excess thermodynamic functions of the systems: benzene + p-xylene and benzene + p-dioxan,
Trans. Faraday Soc., 1971, 67, 2282-2291. [all data]
Swietoslawski and Zielenkiewicz, 1958
Swietoslawski, W.; Zielenkiewicz, A.,
Mean specific heats of binary positive azeotropes,
Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1958, 6, 367-369. [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]
Kurbatov, 1947
Kurbatov, V.Ya.,
Specific heat of liquids. I. Specific heat of benzenoid hydrocarbons,
Zhur. Obshch. Khim., 1947, 17, 1999-2003. [all data]
Willams and Daniels, 1924
Willams, J.W.; Daniels, F.,
The specific heats of certain organic liquids at elevated temperatures,
J. Am. Chem. Soc., 1924, 46, 903-917. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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