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EXCESS PARTIAL MOLAR ENTHALPIES AND FREE-ENERGIES IN METHANOL ISOBUTANOL MIXTURES AT 20-DEGREES-C - THE EFFECT OF SIZE DIFFERENCE

TitleEXCESS PARTIAL MOLAR ENTHALPIES AND FREE-ENERGIES IN METHANOL ISOBUTANOL MIXTURES AT 20-DEGREES-C - THE EFFECT OF SIZE DIFFERENCE
Publication TypeJournal Article
Year of Publication1993
AuthorsLai, JTW, Kam, JSC, Lau, FW, Beach, LJ, Koga, Y
JournalThermochimica Acta
Volume230
Pagination39-53
Date PublishedDec
Type of ArticleArticle
ISBN Number0040-6031
Keywords25 DEGREES C, ALLOYS, BUTANOL, CONCENTRATION FLUCTUATIONS, NA-CS, SYSTEMS, WATER
Abstract

The excess partial molar enthalpies, H(m)E(i), and free energies, G(m)E(i), (where i is methanol or isobutanol) were determined at 20.00-degrees-C in methanol-isobutanol mixtures. The Bhatia-March approach (J. Phys. F, 5 (1975) 1100), taking into account the size difference between the components within the framework of the conformational solution theory, was applied to explain the composition dependence of H(m)E(i) and G(m)E(i). It was reasonably successful : however, it did not seem to work for the other isomeric butanol and methanol mixtures.

URL<Go to ISI>://A1993MW43000004