The Bulk Properties
of Ethylene GlycolDimethylsulfoxide Mixtures
over the Temperature Range 278323 K at p = 0.1 MPa

G. I. Egorov and D. M. Makarov

Institute of the Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia

e-mail: gie@isc-ras.ru

Received May 30, 2007

Abstract—The densities of ethylene glycol–dimethylsulfoxide binary mixtures were measured over the tem-
perature range 278–323.15 K at atmospheric pressure using a vibrational densimeter. The excess molar vol-
umes, apparent molar volumes, partial molar volumes of mixture components, volumetric thermal expansion
coefficients, and partial molar volumetric thermal expansion coefficients were calculated. The excess molar vol-
umes were described by the Redlich–Kister equation, and the partial molar volumes were calculated by two
methods. The density–composition dependence contained a weak maximum, which disappeared as the temper-
ature increased. The excess molar volumes were negative, and deviations from ideality increased as the temper-
ature grew.

DOI: 10.1134/S003602440810021X

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