Acetic acid, sodium salt, hydrate (1:1:3)
- Formula: C2H3NaO2·H6O3
- Molecular weight: 136.0796
- IUPAC Standard InChI: InChI=1S/C2H4O2.Na.3H2O/c1-2(3)4;;;;/h1H3,(H,3,4);;3*1H2/q;+1;;;/p-1
- IUPAC Standard InChIKey: AYRVGWHSXIMRAB-UHFFFAOYSA-M
- CAS Registry Number: 6131-90-4
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: sodium acetate trihydrate
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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 by: Eugene S. Domalski and Elizabeth D. Hearing
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 54.73 | 298.15 | Meisingset and Gronvold, 1984 | T = 270 to 400 K. |
| 77.0 | 325. | Sturley, 1932 | Temperatures above and below melting point. |
Phase change data
Go To: Top, Condensed phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 4.8399 | 331.7 | Sturley, 1932 |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 15. | 331.7 | Sturley, 1932 |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 9.0488 | 331.52 | crystaline | Meisingset and Gronvold, 1984 | Transition of trihydrate to anhydrous salt and aqueous solution. |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 27.29 | 331.52 | crystaline | Meisingset and Gronvold, 1984 | Transition |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Meisingset and Gronvold, 1984
Meisingset, K.K.; Gronvold, F.,
Thermodynamic properties and phase transitions of salt hydrates between 270 and 400 K. III. CH3CO2Na.3H2O, CH3CO2Li.2H2O, and (CH3CO2)2Mg.4H2O,
J. Chem. Thermodynam., 1984, 16, 523-536. [all data]
Sturley, 1932
Sturley, K.R.,
Fresh data on the latent heats and heat conductivities of some aquacrystalline compounds,
J. Soc. Chem. Ind. Trans. Comm., 1932, 51, 271T-273T. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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