Density and speed of sound were measured earlier by us for binary liquid mixtures formed by Benzonitrile, Chlorobenzene, Benzyl chloride and Benzyl alcohol with Benzene at temperature range 298.15 to 313.15 K and atmospheric pressure over the whole concentration range. Pseudo-Gruneisen parameter and internal pressure were derived from the measured values of density and ultrasonic velocity. These values were compared with the theoretical values obtained by the utilization of Flory theory, Ramaswamy and Anbananthan model and model suggested by Glinski to predict the behavior of weakly interacting liquids. The observed properties derived from measured data were fitted to Redlich-Kister polynomial relation to estimate the binary coefficients and standard errors. Excess Pseudo-Gruneisen parameter for these binary mixtures was computed to study the molecular interactions involved in the liquid systems.
Viscosities and excess viscosities for three binary systems (2-propanol + benzyl alcohol, 2-propanol + 2phenylethanol, and benzyl alcohol + 2-phenylethanol) were computed at T= (298.15, 308.15, and 318.15) K over the concentration range 0.05-0.95 at atmospheric pressure and compared with the experimental work of Ching-Ta et al. Different theoretical models assuming association and non-association of the components of the mixtures, were used to predict the behavior of the studied liquids, which would typically show strong interactions. The properties were fitted to the Redlich-Kister polynomial equation to estimate the binary coefficients and standard errors. The excess viscosities were used to study the nature and extent of the molecular interactions in the binary mixtures. McAllister multi body interaction model was used to correlate the properties of the binary liquid mixtures. Testing of the models for the different systems showed that, compared with the non-association model theoretical results, the association model theoretical results were more consistent with the experimental results.
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