1,2-Diaceto-3-stearin
- Formula: C25H46O6
- Molecular weight: 442.6291
- CAS Registry Number: 26836-44-2
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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 (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 904.2 | 298.2 | Ward, Vicknair, et al., 1955 | crystaline, α phase; T = -69 to 97°C. Give experimental points and equations for 2 solid and liquid forms. Sub-alpha form, Cp = 0.4315 + 0.00104t cal/g*K (-73 to -1°C); alpha form, Cp = 0.4349 + 0.00213t cal/g*K (-3 to 33°C); liquid Cp = 0.3790 + 0.00195t cal/g*K (77 to 97°C). |
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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 308. | K | N/A | Ward, Vicknair, et al., 1955, 2 | Uncertainty assigned by TRC = 0.2 K; TRC |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 45.560 | 208.3 | crystaline, α | liquid | Ward, Vicknair, et al., 1955 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 218.7 | 208.3 | crystaline, α | liquid | Ward, Vicknair, et al., 1955 | DH |
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.
Ward, Vicknair, et al., 1955
Ward, T.L.; Vicknair, E.J.; Singleton, W.S.; Feuge, R.O.,
Some thermal properties of 1-monostearin, 1-aceto-3-stearin and 1,2-diaceto-3-stearin,
J. Phys. Chem., 1955, 59, 4-7. [all data]
Ward, Vicknair, et al., 1955, 2
Ward, T.L.; Vicknair, E.J.; Singleton, W.S.; Feuge, R.O.,
Some thermal properties of 1-monostearin, 1-aceto-3-stearin and 1,2-diaceto-3-stearin,
J. Phys. Chem., 1955, 59, 4. [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 Tfus Fusion (melting) point ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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