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Piperazine

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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, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Ttriple419.5KN/ASteele, Chirico, et al., 1997Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Deltavap12.0 ± 0.45kcal/molEBSteele, Chirico, et al., 1997, 2Based on data from 417. - 460. K.; AC
Deltavap19.7 ± 3.1kcal/molEBSteele, Chirico, et al., 1997, 2Based on data from 370. - 523. K.; AC
Quantity Value Units Method Reference Comment
Deltasub17.2kcal/molN/AVerevkin, 1998AC

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
15.2 ± 0.53480.EBSteele, Chirico, et al., 1997, 2Based on data from 370. - 523. K.; AC
14.6 ± 0.48520.EBSteele, Chirico, et al., 1997, 2Based on data from 370. - 523. K.; AC

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
15.6385.BSteele, Chirico, et al., 1997, 2AC
20.8419.N/ASteele, Chirico, et al., 1997, 2AC
17.5294.N/AStephenson and Malanowski, 1987Based on data from 279. - 321. K.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
5.28381.8DSCLee, Chang, et al., 1997AC
6.38384.6N/ASteele, Chirico, et al., 1997, 2AC
4.64419.5N/ASteele, Chirico, et al., 1997, 2AC

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.

Steele, Chirico, et al., 1997
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Smith, N.K., Thermocynamic Properties and Ideal-Gas Enthalpies of Formation for Carbonate, Piperazine, Hexachloroprop-1-ene, Tetrakis(dimethylamino) ethylene, N,N'-Bis(2-hydroxyethyl)ethylenediamine, and 1,2,4-Tr, J. Chem. Eng. Data, 1997, 42, 1037-52. [all data]

Steele, Chirico, et al., 1997, 2
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Smith, N.K., Thermodynamic Properties and Ideal-Gas Enthalpies of Formation for Dicyclohexyl Sulfide, Diethylenetriamine, Di- n -octyl Sulfide, Dimethyl Carbonate, Piperazine, Hexachloroprop-1-ene, Tetrakis(dimethylamino)ethylene, N , N '-Bis-(2-hydroxyethyl)ethylenediamine, and 1,2,4-Triazolo[1,5- a ]pyrimidine, J. Chem. Eng. Data, 1997, 42, 6, 1037-1052, https://doi.org/10.1021/je9700986 . [all data]

Verevkin, 1998
Verevkin, Sergey P., Thermochemistry of amines: strain in six-membered rings from experimental standard molar enthalpies of formation of morpholines and piperazines, The Journal of Chemical Thermodynamics, 1998, 30, 9, 1069-1079, https://doi.org/10.1006/jcht.1998.0371 . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Lee, Chang, et al., 1997
Lee, Ming-Jer; Chang, Yao-Kun; Lin, Ho-mu; Chen, Chang-Hsin, Solid-Liquid Equilibria for 4-Methoxyphenol with Catechol, Ethylenediamine, or Piperazine, J. Chem. Eng. Data, 1997, 42, 2, 349-352, https://doi.org/10.1021/je960201b . [all data]


Notes

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