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Urea, ethyl-

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Deltafgas-61.53 ± 0.24kcal/molCcbKabo, Miroshnichenko, et al., 1990see Simirsky, Kabo, et al., 1987 and Simirskii, Kabo, et al., 1986

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

Quantity Value Units Method Reference Comment
Deltafsolid-85.51 ± 0.18kcal/molCcbKabo, Miroshnichenko, et al., 1990see Simirsky, Kabo, et al., 1987 and Simirskii, Kabo, et al., 1986
Deltafsolid-81.2kcal/molCcbSchmidt and Becker, 1933 
Quantity Value Units Method Reference Comment
Deltacsolid-469.91 ± 0.15kcal/molCcbKabo, Miroshnichenko, et al., 1990see Simirsky, Kabo, et al., 1987 and Simirskii, Kabo, et al., 1986
Deltacsolid-472.2kcal/molCcbSchmidt and Becker, 1933 

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Mass spectrum (electron ionization), 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos
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
Tfus367.8KN/ADellaGatta and Ferro, 1987Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Ttriple368.9KN/AFerloni and DellaGatta, 1995Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; TRC
Ttriple365.0KN/AKabo, Miroshnichenko, et al., 1990, 2Uncertainty assigned by TRC = 0.00001 K; TRC

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
23.4 ± 0.26344.MEZaitsau, Kabo, et al., 2003Based on data from 323. - 364. K.; AC
23.4 ± 0.26350.MEZaitsau, Kabo, et al., 2003Based on data from 323. - 364. K.; AC
23.0 ± 0.26350.CZaitsau, Kabo, et al., 2003AC
24.0 ± 0.2337.CKabo, Miroshnichenko, et al., 1990see Simirsky, Kabo, et al., 1987 and Simirskii, Kabo, et al., 1986; ALS
21.9 ± 0.29354.TEPiacente, Ferro, et al., 1990Based on data from 333. - 365. K. See also Ferro, Barone, et al., 1987.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
3.3317367.8N/ADella Gatta and Ferro, 1987DH
2.3356.7DSCHashimoto, Tajima, et al., 2005AC
3.501368.9DSCFerloni and Gatta, 1995AC
3.439365.1N/AKabo, Miroshnichenko, et al., 1990AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
9.06367.8Della Gatta and Ferro, 1987DH

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:


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin RADIAN CORP
NIST MS number 76308

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References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Kabo, Miroshnichenko, et al., 1990
Kabo, G.Ya.; Miroshnichenko, E.A.; Frenkel, M.L.; Kozyro, A.A.; Simirskii, V.V.; Krasulin, A.P.; Vorob'eva, V.P.; Lebedev, Yu.A., Thermochemistry of urea alkyl derivatives, Bull. Acad. Sci. USSR, Div. Chem. Sci., 1990, 662-667. [all data]

Simirsky, Kabo, et al., 1987
Simirsky, V.V.; Kabo, G.J.; Frenkel, M.L., Additivity of the enthalpies of formation of urea derivatives in the crystalline state, J. Chem. Thermodyn., 1987, 19, 1121-1127. [all data]

Simirskii, Kabo, et al., 1986
Simirskii, V.V.; Kabo, G.Ya.; Frenkel, M.L., Enthalpies of combustion and of formation of monoalkyl derivatives of urea, Russ. J. Phys. Chem. (Engl. Transl.), 1986, 60, 1233-1234. [all data]

Schmidt and Becker, 1933
Schmidt, V.A.; Becker, F., Die Bildungswarme von Nitrocellulofen, Nitroglycerin und anderen widuigen Beltandteilen von Treibmitteln, Z. Gesamte Schiess Sprengstoffwes., 1933, 33, 280-282. [all data]

DellaGatta and Ferro, 1987
DellaGatta, G.; Ferro, D., Enthalpies of fusion and solid-to-solid transition, entropies of fusion for urea and twelve alkylurea, Thermochim. Acta, 1987, 122, 143-52. [all data]

Ferloni and DellaGatta, 1995
Ferloni, P.; DellaGatta, G., Heat capacities of urea, N-methylurea, N-ethylurea, N-(n)propylurea, and N- (n)butylurea in the range 200 to 360 K, Thermochim. Acta, 1995, 266, 203-12. [all data]

Kabo, Miroshnichenko, et al., 1990, 2
Kabo, G.Ya.; Miroshnichenko, E.A.; Frenkel, M.L.; Kozyro, A.A.; Simirsky, V.V.; Krasulin, A.P.; Vorob'eva, V.P.; Lebedev, Yu.A., Thermochemistry of Alkyl Derivatives of Urea, Izv. Akad. Nauk SSSR, Ser. Khim., 1990, No. 4, 750-5. [all data]

Zaitsau, Kabo, et al., 2003
Zaitsau, Dz; Kabo, G.J.; Kozyro, A.A.; Sevruk, V.M., The effect of the failure of isotropy of a gas in an effusion cell on the vapor pressure and enthalpy of sublimation for alkyl derivatives of carbamide, Thermochimica Acta, 2003, 406, 1-2, 17-28, https://doi.org/10.1016/S0040-6031(03)00231-4 . [all data]

Piacente, Ferro, et al., 1990
Piacente, V.; Ferro, D.; Gatta, G. Della, Sublimation enthalpy of eleven alkyl derivatives of urea, Thermochimica Acta, 1990, 158, 1, 79-85, https://doi.org/10.1016/0040-6031(90)80054-3 . [all data]

Ferro, Barone, et al., 1987
Ferro, D.; Barone, G.; Della Gatta, G.; Piacente, V., Vapour pressures and sublimation enthalpies of urea and some of its derivatives, The Journal of Chemical Thermodynamics, 1987, 19, 9, 915-923, https://doi.org/10.1016/0021-9614(87)90038-3 . [all data]

Della Gatta and Ferro, 1987
Della Gatta, G.; Ferro, D., Enthalpies of fusion and solid-to-solid transition, entropies of fusion for urea and twelve alkylureas, Thermochim. Acta, 1987, 122, 143-152. [all data]

Hashimoto, Tajima, et al., 2005
Hashimoto, Masao; Tajima, Fukue; Eda, Kazuo; Yamamura, Kimiaki; Okazaki, Tadashi, Exploration of plastic-like phases in alkylurea systems. A thermal and X-ray study, Journal of Molecular Structure, 2005, 734, 1-3, 23-33, https://doi.org/10.1016/j.molstruc.2004.08.008 . [all data]

Ferloni and Gatta, 1995
Ferloni, Paolo; Gatta, Giuseppe Della, Heat capacities of urea, N-methylurea, N-ethylurea, N-(n)propylurea, and N-(n)butylurea in the range 200 to 360 K, Thermochimica Acta, 1995, 266, 203-212, https://doi.org/10.1016/0040-6031(95)02453-0 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References