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Barbital

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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, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus463.KN/AKuffner, Bush, et al., 1957Uncertainty assigned by TRC = 4. K; not clear that this was measured by author; TRC
Quantity Value Units Method Reference Comment
Deltasub117.3 ± 0.6kJ/molMERibeiro da Silva, Ribeiro da Silva, et al., 2009Based on data from 355. - 377. K.; AC

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
113.9 ± 0.6366.MERibeiro da Silva, Ribeiro da Silva, et al., 2009Based on data from 355. - 377. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
24.8462.DSCRibeiro da Silva, Ribeiro da Silva, et al., 2009AC
24.98462.6N/AChauvet, De Maury, et al., 1986AC

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

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

Kuffner, Bush, et al., 1957
Kuffner, R.J.; Bush, M.T.; Bircher, L.J., Studies on the surface tension of aqueous barbituric acid solutions, J. Am. Chem. Soc., 1957, 79, 1587-1589. [all data]

Ribeiro da Silva, Ribeiro da Silva, et al., 2009
Ribeiro da Silva, Maria das Dores M.C.; Ribeiro da Silva, Manuel A.V.; Freitas, Vera L.S.; Roux, Maria Victoria; Jiménez, Pilar; Temprado, Manuel; Dávalos, Juan Z.; Cabildo, Pilar; Claramunt, Rosa M.; Elguero, José, Structural studies of cyclic ureas: 3. Enthalpy of formation of barbital, The Journal of Chemical Thermodynamics, 2009, 41, 12, 1400-1407, https://doi.org/10.1016/j.jct.2009.06.018 . [all data]

Chauvet, De Maury, et al., 1986
Chauvet, A.; De Maury, G.; Terol, A.; Masse, J., Etude thermoanalytique de substances psychotropes, Thermochimica Acta, 1986, 97, 143-159, https://doi.org/10.1016/0040-6031(86)87015-0 . [all data]


Notes

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