Densities, viscosities, and speeds of sound for the binary mixtures of hexyl acetate with tetrahydrofuran, 1,4-dioxane, anisole, and butyl vinyl ether were measured at (298.15, 303.15, 308.15, and 313.15) K. From the experimental data, values of excess volume, V E, deviation in viscosity Δη, and deviation in isentropic compressibility ΔK S, have been calculated. These results were fitted to Redlich–Kister polynomial equation. The excess volumes V E and deviations in isentropic compressibility ΔK s were found to be completely negative, while the deviations in viscosity Δη were found to be either negative or positive depending on the nature of liquid mixtures.

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Densities, viscosities, and speed of sound have been determined at T = (303.15, 308.15, and 313.15) K for the binary mixtures of methyl benzoate with tetrahydrofuran, 1,4-dioxane, anisole, and butyl vinyl ether over the entire range of composition. Using these measured values, excess volume , deviation in viscosities Δ , excess Gibb's free energy of activation for viscous flow Δ * , and deviation in isentropic compressibility Δ have been calculated. These calculated binary data have been fitted to Redlich-Kister equation to determine the appropriate coefficients. The values of excess volume and deviation in viscosities Δ are negative over the entire range of composition for all the binary systems at the studied temperatures. The behavior of these parameters with composition of the mixture has been discussed in terms of molecular interactions between the components of liquids.

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