ISSN:
1572-8927
Keywords:
Excess volume
;
viscosities
;
Gibbs free energies of activation of flow
;
DMSO
;
alkanols
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Excess volumes and viscosities have been determined for DMSO + n-hexanol, + n-heptanol, + n-octanol, and + n-decanol at 40°C. The excess partial molar volumes V 1 E , changes in viscosities Δη, the parameter d of the Grunberg and Nissan expression, and excess Gibbs free energies of activation of flow ΔG * E have been calculated from the experimental data. All the excess volumes are positive over the whole composition range, with V E increasing with the length of the alkanol chain. V E results are discussed in terms of disruption of alkanol multimers, weakening of interactions between DMSO molecules, influence of interactions between components, and structural effects. The V E data have also been analyzed using the Prigogine-Flory-Patterson expression which separates V E into three contributions. Correlation is also observed between the sign of Δη and V E for all the mixtures studied.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00646079
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