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Title: Densities, viscosities, viscosity deviations and excess thermodynamic properties of binary liquid mixtures of diethyl oxalate and dimethyl malonate with polar and non-polar solvents at 303.15 K
Authors: Diwedi, Archana
Singh, Mukhtar
Issue Date: May-2007
Publisher: CSIR
Abstract: Densities and viscosities have been measured for the binary liquid mixtures of diethyl oxalate and dimethyl malonate with some polar and non-polar solvents, viz. ethanol, acetone, chloroform, carbon tetrachloride, benzene and toluene over the entire composition range at 303.15 K. From density and viscosity data, the values of viscosity deviations (Δη) and excess thermodynamics properties, viz. the excess molar volumes (VE) and the excess Gibbs free energies of activation of viscous flow (ΔG#E) of the binary mixtures have been determined at 303.15 K. The values of , VE and ΔG#E have been fitted to Redlich-Kister polynomial equation to estimate the binary coefficients and standard deviation between the experimental and computed values. On correlating the viscosities of the binary liquid mixtures with the equations of Nissan-Grunberg and McAllister, it is concluded that the viscosities are best correlated with McAllister equation.
Page(s): 789-794
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.46A(05) [May 2007]

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