Densities, Viscosities and Speeds of sound for Binary Liquid Mixtures of Hexyl acetate with Some Aryl Compounds at Different Temperatures.

Abstract

Densities and viscosities of binary mixtures of hexyl acetate with chlorobenzene, bromobenzene, fluorobenzene and nitrobenzene have been measured at (298.15, 303.15, 308.15 and 313.15) K over the entire composition range. Speeds of sound of these binary liquid mixtures have also been measured at 303.15 K. From the experimental density and viscosity data, the values of excess molar volume V E , free energy of activation for viscous flow Δ G E , while from the speed of sound data the isentropic compressibility K S , intermolecular free length L f , internal pressure π i , free volume V f , and specific acoustic impedance Z have been calculated. The excess molar volumes for these binary mixtures were negative over the whole composition range at all temperatures. The viscosity values were correlated using Frenkel and McAllister (four-body) models.