Cycloheptane-thiourea adduct
- Formula: C10H26N6S3
- Molecular weight: 326.549
- CAS Registry Number: 39822-97-4
- Information on this page:
- Options:
Condensed phase thermochemistry data
Go To: Top, Phase change 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 179.0 | J/mol*K | N/A | Cope, Gannon, et al., 1972 | crystaline, I phase; Does not include possible zero-point entropy. |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 148.3 | 298.15 | Cope, Gannon, et al., 1972 | crystaline, I phase; T = 12 to 300 K. Values for one mole of thiourea. |
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 phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.368 | 162.4 | crystaline, V | crystaline, IV | Cope, Gannon, et al., 1972 | |
| 0.568 | 241. | crystaline, IV | crystaline, III | Cope, Gannon, et al., 1972 | |
| 0.093 | 262. | crystaline, III | crystaline, II | Cope, Gannon, et al., 1972 | Shallow hump at 270 to 290 K, H = 4802 J/mol (thiourea), S = 34.50 J/mol*K. |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.24 | 162.4 | crystaline, V | crystaline, IV | Cope, Gannon, et al., 1972 | |
| 2.36 | 241. | crystaline, IV | crystaline, III | Cope, Gannon, et al., 1972 | |
| 0.36 | 262. | crystaline, III | crystaline, II | Cope, Gannon, et al., 1972 | Shallow |
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.
Cope, Gannon, et al., 1972
Cope, A.F.G.; Gannon, D.J.; Parsonage, N.G.,
Thermodynamic properties of thiourea + hydrocarbon adducts from 12 to 300K. The heat capacities and entropies of the adducts of c-C6H12, c-C7H14, c-C8H16, and (CH3)3C.C2H5,
J. Chem. Thermodynam., 1972, 4, 829-842. [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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.