Urea, tetraethyl-
- Formula: C9H20N2O
- Molecular weight: 172.2679
- IUPAC Standard InChIKey: UWHSPZZUAYSGTB-UHFFFAOYSA-N
- CAS Registry Number: 1187-03-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Tetraethylurea; 1,1,3,3-Tetraethylurea; Urea, 1,1,3,3-tetraethyl-; N,N,N',N'-Tetraethylurea
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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°liquid | -380.0 ± 5.0 | kJ/mol | Ccb | Kozyro, Simirskii, et al., 1990 | ALS |
ΔfH°liquid | -554.0 ± 5.9 | kJ/mol | Ccb | Tavernier and Lamouroux, 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = -541.87 kJ/mol; Author's hf298_condensed=-134.219 kcal/mol; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -6019.9 ± 4.8 | kJ/mol | Ccb | Kozyro, Simirskii, et al., 1990 | ALS |
ΔcH°liquid | -5845.9 ± 5.9 | kJ/mol | Ccb | Tavernier and Lamouroux, 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = -5858.06 kJ/mol; Author's hf298_condensed=-134.219 kcal/mol; ALS |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
355.6 | 298.15 | Kozyro, Simirskii, et al., 1990, 2 | T = 160 to 370 K. Cp(c) = 77.10 + 0.7804 T (160 to 230 K); Cp(liq) = 235.75 + 0.4019 T (290 to 370 K) J/mol*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.
Kozyro, Simirskii, et al., 1990
Kozyro, A.A.; Simirskii, V.V.; Kabo, G.Ya.; Frenkel, M.L.; Krasulin, A.P.; Sevruk, V.M.; Sokolov, N.A.,
The additivity of the thermodynamic properties of tetra-alkyl derivatives of carbamide,
Russ. J. Phys. Chem. (Engl. Transl.), 1990, 64, 1274-1275. [all data]
Tavernier and Lamouroux, 1956
Tavernier, P.; Lamouroux, M.,
Determinations calorimetriques relatives a vingt-six substances organiques,
Mem. Poudres, 1956, 38, 65-88. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Kozyro, Simirskii, et al., 1990, 2
Kozyro, A.A.; Simirskii, V.V.; Kabo, G.Ya.; Frenkel, M.L.; Krasulin, A.P.; Sevruk, V.M.; Sokolov, N.A.,
The additivity of the thermodynamic properties of tetra-alkyl derivatives of carbamide,
Zhur. Fiz. Khim., 1990, 64(9), 2360-2365. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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