Measurement and correlation of excess molar enthalpies for (ethanediol, or 1,2-propanediol, or 1,2-butanediol + water) at the temperatures (285.65, 298.15, 308.15, 323.15, and 338.15) K

The excess molar enthalpies for (ethanediol, or 1,2-propanediol , or 1,2-butanediol + water) have been measured at five different temperatures over the whole composition range in an LKB flow microcalorimeter. A flow-mix cell has been developed and used for the measurements. All the mixtures exhibit...

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Bibliographic Details
Published inThe Journal of chemical thermodynamics Vol. 31; no. 9; pp. 1113 - 1127
Main Authors Kracht, C., Ulbig, P., Schulz, S.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.09.1999
Elsevier
Subjects
Chemical thermodynamics
Chemistry
Exact sciences and technology
excess enthalpies
flow calorimetry
General and physical chemistry
group-contribution model
Mixtures
Thermodynamic properties
group-contribution model
flow calorimetry
excess enthalpies
Water
Diol
Enthalpy
Binary system
Group contribution method
Excess parameter
Microcalorimetry
Experimental study
Temperature range 273-400 K
Butanediols
Thermal analysis
Aqueous solution
Propanediol
Thermodynamic properties
Glycol
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Summary:The excess molar enthalpies for (ethanediol, or 1,2-propanediol , or 1,2-butanediol + water) have been measured at five different temperatures over the whole composition range in an LKB flow microcalorimeter. A flow-mix cell has been developed and used for the measurements. All the mixtures exhibit negative excess enthalpies. The model parameters of the two group-contribution models EBGCM and modified UNIFAC of Weidlich and Gmehling were fitted with the experimental data and the calculated results are compared with the experimental data.
ISSN:0021-9614
1096-3626
DOI:10.1006/jcht.1999.0511