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Study of Molecular Interactions in Binary Liquid Mixtures Containing Higher Alcohols at Different Temperatures

M Sri Lakshmi, R Ramesh Raju, C Rambabu, GV Rama Rao, K Narendra

Ultrasonic velocity, density and viscosity are measured in binary liquid mixtures of cyclohexanone with n-heptanol, n-octanol and iso-octanol at temperatures (303.15, 308.15, 313.15 and 318.15) K over the entire range of composition. By using these data, parameters such as adiabatic compressibility, β, molar volume, V are calculated and some excess parameters like excess adiabatic compressibility, βE, excess molar volume, VE, deviation in viscosity, Δη, and excess Gibb’s free energy of activation for viscous flow, ΔG*E are calculated. The calculated excess and deviation functions have been fitted to the Redlich-Kister polynomial equation. The observed negative and positive excess values or deviation parameters have been explained in the light of intermolecular interactions present in these binary liquid mixtures.