1,2-Benzenedicarboxylic acid

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Condensed phase thermochemistry 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:
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
Δfsolid-186.93kcal/molCcbSchwabe and Wagner, 1961ALS
Δfsolid-186.88kcal/molCcbParks, Mosley, et al., 1950see Richardson and Parks, 1939; ALS
Quantity Value Units Method Reference Comment
Δcsolid-770.44 ± 0.12kcal/molCcbSchwabe and Wagner, 1961Corresponding Δfsolid = -186.91 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcsolid-770.49kcal/molCcbParks, Mosley, et al., 1950see Richardson and Parks, 1939; Corresponding Δfsolid = -186.86 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcsolid-771.979kcal/molCcbVerkade, 1926Corresponding Δfsolid = -185.38 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
solid,1 bar49.699cal/mol*KN/AParks, Todd, et al., 1936Extrapolation below 90 K, 66.19 J/mol*K.; DH

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
48.21323.Satoh and Sogabe, 1941T = 0 to 100 C. Mean value.; DH
48.21323.Satoh and Sogabe, 1939T = 0 to 100 C. Mean value.; DH
44.959298.1Parks, Todd, et al., 1936T = 90 to 300 K.; DH

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

Quantity Value Units Method Reference Comment
Tfus480.KN/AParks, Todd, et al., 1936, 2Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Δsub31.0 ± 0.1kcal/molCSabbah and Perez, 1999AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
8.72463.5Sabbah and Perez, 1999AC

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:


Reaction thermochemistry 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

1,2-Benzenedicarboxylic acid = Water + Phthalic anhydride

By formula: C8H6O4 = H2O + C8H4O3

Quantity Value Units Method Reference Comment
Δr7.631 ± 0.069kcal/molCmAlekseev, Kizaev, et al., 1989solid phase; solvent: Aqueous; Enthapy of anhydridisation

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Schwabe and Wagner, 1961
Schwabe, K.; Wagner, W., Verbrennungs- und bildungswarmen der drei isomeren phthalsauren, Z. Electrochem., 1961, 65, 812-815. [all data]

Parks, Mosley, et al., 1950
Parks, G.S.; Mosley, J.R.; Peterson, P.V., Jr., Heats of combustion and formation of some organic compounds containing oxygen, J. Chem. Phys., 1950, 18, 152. [all data]

Richardson and Parks, 1939
Richardson, J.W.; Parks, G.S., Thermal data on organic compounds. XIX. Modern combustion data for some non-volatile compounds containing carbon, hydrogen and oxygen, J. Am. Chem. Soc., 1939, 61, 3543-3546. [all data]

Verkade, 1926
Verkade, P.E., Verbrandingswarmten van plaatsings-isomere benzol-derivaten en de theorie der geinduceerde alterneeren de polatiteit, Verslag Akad. Wetenschappen Amsterdam, 1926, 35, 492-504. [all data]

Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Moore, W.A., Thermal data on organic compounds. XVI. Some heat capacity, entropy and free energy data for typical benzene derivatives and heterocyclic compounds, J. Am. Chem. Soc., 1936, 58, 398-401. [all data]

Satoh and Sogabe, 1941
Satoh, S.; Sogabe, T., The heat capacities of some organic compounds containing nitrogen and the atomic heat of nitrogen. (4), Sci., Pap. Inst. Phys. Chem. Res. (Tokyo), 1941, 38, 246-251. [all data]

Satoh and Sogabe, 1939
Satoh, S.; Sogabe, T., The specific heats of some solid aromatic acids and their ammonium salts and the atomic heat of nitrogen, Sci. Pap. Inst. Phys. Chem. Res. (Tokyo), 1939, 36, 449-457. [all data]

Parks, Todd, et al., 1936, 2
Parks, G.S.; Todd, S.S.; Shomate, C.H., Thermal data on organic compounds. XVII. Some heat capacity, entropy and free energy data for five higher olefins, J. Am. Chem. Soc., 1936, 58, 2505. [all data]

Sabbah and Perez, 1999
Sabbah, Raphaël; Perez, Laurence, Étude thermodynamique des acides phtalique, isophtalique et téréphtalique, Revue canadienne de chimie, 1999, 77, 9, 1508-1513, https://doi.org/10.1139/cjc-77-9-1508 . [all data]

Alekseev, Kizaev, et al., 1989
Alekseev, V.G.; Kizaev, V.D.; Fedyainov, N.V.; Bushinskii, V.I., Standard enthalpies of anhydridisation of phthalic and pyromellitic acids, Russ. J. Phys. Chem. (Engl. Transl.), 1989, 63, 1280-1282. [all data]


Notes

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