1,2,3-Propanetricarboxylic acid, 2-hydroxy-, hydrate (1:1)
- Formula: C6H8O7·H2O
- Molecular weight: 210.1388
- IUPAC Standard InChI: InChI=1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2
- IUPAC Standard InChIKey: YASYEJJMZJALEJ-UHFFFAOYSA-N
- CAS Registry Number: 5949-29-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Citric acid monohydrate; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate; Citric acid monohydrat; citric 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 | -1838. | kJ/mol | Ccb | Chappel and Hoare, 1958 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -1952. | kJ/mol | Ccb | Chappel and Hoare, 1958 | Corresponding ΔfHºsolid = -1838. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 283.5 | J/mol*K | N/A | Evans, Hoare, et al., 1962 | DH |
| S°solid,1 bar | 285.32 | J/mol*K | N/A | De Kruif, Van Miltenburg, et al., 1982 | DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 269.52 | 300. | De Kruif, Van Miltenburg, et al., 1982 | T = 120 to 300 K.; DH |
| 268.1 | 298.15 | Evans, Hoare, et al., 1962 | T = 21 to 303 K.; 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.
Chappel and Hoare, 1958
Chappel, F.P.; Hoare, F.E.,
The heat of combustion of citric acid monohydrate,
Trans. Faraday Soc., 1958, 54, 367-371. [all data]
Evans, Hoare, et al., 1962
Evans, D.M.; Hoare, F.E.; Melia, T.P.,
Heat capacity, enthalpy and entropy of citric acid monohydrate,
Trans. Faraday Soc., 1962, 58, 1511-1514. [all data]
De Kruif, Van Miltenburg, et al., 1982
De Kruif, C.G.; Van Miltenburg, J.C.; Sprenkels, A.J.J.; Stevens, G.,
Thermodynamic properties of citric acid and the system citric acid-water,
Thermochim. Acta, 1982, 58, 341-354. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) 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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