Urea-n-undecane adduct
- Formula: C2·H12·N12O6
- Molecular weight: 300.1935
- CAS Registry Number: 1191-63-5
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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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 32.98 | cal/mol*K | N/A | Cope and Parsonage, 1969 | Does not include possible zero-point entropy. |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 30.88 | 298.15 | Cope and Parsonage, 1969 | T = 12 to 300 K. Values for one mole urea in adduct. |
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 by: Eugene S. Domalski and Elizabeth D. Hearing
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.03456 | 122.4 | crystaline, II | crystaline, I | Cope and Parsonage, 1969 |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.282 | 122.4 | crystaline, II | crystaline, I | Cope and Parsonage, 1969 |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cope and Parsonage, 1969
Cope, A.F.G.; Parsonage, N.G.,
Thermodynamic properties of urea + hydrocarbon adducts from 12 to 300 K. The heat capacities and entropies of the adducts of the n-paraffin C11H24 and the 1-olefins C10H20, C16H32, and C20H40,
J. Chem. Thermodynam., 1969, 1, 99-110. [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 S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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