Terephthalic acid
- Formula: C8H6O4
- Molecular weight: 166.1308
- IUPAC Standard InChI: InChI=1S/C8H6O4/c9-7(10)5-1-2-6(4-3-5)8(11)12/h1-4H,(H,9,10)(H,11,12)
- IUPAC Standard InChIKey: KKEYFWRCBNTPAC-UHFFFAOYSA-N
- CAS Registry Number: 100-21-0
- 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. - Other names: 1,4-Benzenedicarboxylic acid; p-Benzenedicarboxylic acid; p-Dicarboxybenzene; p-Phthalic acid; WR 16262; Benzene, 1,4-dicarboxylic acid; Acide terephtalique; Benzene, p-dicarboxylic acid; TPA; Kyselina tereftalova; TA 12; Ta-33mp; 1,4-Dicarboxybenzene; NSC 36973; p-Carboxybenzoic acid
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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°solid | -816.3 ± 1.5 | kJ/mol | Ccb | Karyakin, Rabinovich, et al., 1978 | ALS |
| ΔfH°solid | -816.17 | kJ/mol | Ccb | Schwabe and Wagner, 1961 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3189.3 ± 1.5 | kJ/mol | Ccb | Karyakin, Rabinovich, et al., 1978 | Corresponding ΔfHºsolid = -816.3 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3189.5 ± 0.42 | kJ/mol | Ccb | Schwabe and Wagner, 1961 | Corresponding ΔfHºsolid = -816.09 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3227.96 | kJ/mol | Ccb | Hirsbrunner, 1934 | Corresponding ΔfHºsolid = -777.613 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 199.6 | 323. | Satoh and Sogabe, 1941 | T = 0 to 100 C. Mean value.; 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.
Karyakin, Rabinovich, et al., 1978
Karyakin, N.V.; Rabinovich, I.B.; Sokolov, L.B.,
Thermodynamics of the synthesis of isomeric poly(phenylenephthalamides),
Vysokomol. Soedin. Ser. B, 1978, 20, 662-666. [all data]
Schwabe and Wagner, 1961
Schwabe, K.; Wagner, W.,
Verbrennungs- und bildungswarmen der drei isomeren phthalsauren,
Z. Electrochem., 1961, 65, 812-815. [all data]
Hirsbrunner, 1934
Hirsbrunner, H.,
Uber das gleichgewicht der thermischen dissoziation der salicylsaure,
Helv. Chim. Acta, 1934, 17, 477-504. [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]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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