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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

✍ Scribed by C. Kracht; P. Ulbig; S. Schulz

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 464 KB
Volume: 31
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1999.0511

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✦ Synopsis

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.

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