Urea, tetraethyl-

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Gas 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas-75.6 ± 1.2kcal/molCcbKozyro, Simirskii, et al., 1990 

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 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
Δfliquid-90.8 ± 1.2kcal/molCcbKozyro, Simirskii, et al., 1990ALS
Δfliquid-132.4 ± 1.4kcal/molCcbTavernier and Lamouroux, 1956Reanalyzed by Cox and Pilcher, 1970, Original value = -129.51 kcal/mol; Author's hf298_condensed=-134.219 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Δcliquid-1438.8 ± 1.2kcal/molCcbKozyro, Simirskii, et al., 1990ALS
Δcliquid-1397.2 ± 1.4kcal/molCcbTavernier and Lamouroux, 1956Reanalyzed by Cox and Pilcher, 1970, Original value = -1400.11 kcal/mol; Author's hf298_condensed=-134.219 kcal/mol; ALS

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
84.99298.15Kozyro, Simirskii, et al., 1990, 2T = 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

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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil482.KN/ATavernier and Lamouroux, 1956, 2Uncertainty assigned by TRC = 0.00001 K; TRC
Quantity Value Units Method Reference Comment
Ttriple239.7KN/AKabo, Kozyro, et al., 1995Uncertainty assigned by TRC = 0.1 K; TRC

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
15.20 ± 0.13323.3CKozyro, Simirskii, et al., 1990ALS

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
4.9116253.Kozyro, Simirskii, et al., 1990, 2DH
4.912253.Kozyro, Simirskii, et al., 1990, 3See also Domalski and Hearing, 1996 and Kabo, Kozyro, et al., 1995, 2.; AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Gas phase thermochemistry data, 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.

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]

Tavernier and Lamouroux, 1956, 2
Tavernier, P.; Lamouroux, M., Meml. Poudres, 1956, 38, 65. [all data]

Kabo, Kozyro, et al., 1995
Kabo, G.Ya.; Kozyro, A.A.; Diky, V.V.; Simirsky, V.V., Additivity of Thermodynamic Properties of Organic Compounds in Crystalline State. 2. Heat Capacities and Enthalpies of Phase Transition of Alkyl Derivatives of Urea in Crystalline State, J. Chem. Eng. Data, 1995, 40, 371-93. [all data]

Kozyro, Simirskii, et al., 1990, 3
Kozyro, A.A.; Simirskii, V.V.; Kabo, G.Y.; Frenkel, M.L.; Krasulin, A.P.; Sevruk, V.M.; Sokolov, N.A., Additivity of the thermochemical characteristics of tetraalklyl-substituted carbamides, Zh. Fiz. Khim., 1990, 64, 2360. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Kabo, Kozyro, et al., 1995, 2
Kabo, Gennady J.; Kozyro, Alexander A.; Diky, Vladimir V.; Simirsky, Vladimir V., Additivity of Thermodynamic Properties of Organic Compounds in Crystalline State. 2. Heat Capacities and Enthalpies of Phase Transition of Alkyl Derivatives of Urea in Crystalline State, J. Chem. Eng. Data, 1995, 40, 2, 371-393, https://doi.org/10.1021/je00018a005 . [all data]


Notes

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