Density (r), viscosity (η) and speed of sound (u) for binary mixtures of oleic acid with methyl acetate, ethyl acetate, n-propyl acetate and n-butyl acetate were measured at 303.15, 308.15 and 313.15 K over the whole composition range at atmospheric pressure. These results were used to calculate excess molar volumes (VE), deviations in viscosity (Δη), deviations in speed of sound (Δu), the excess Gibbs free energies of activation of viscous flow (G*E), deviation in adiabatic compressibility (ΔkS), acoustic impedance (Z) and deviation in acoustic impedance(ΔZ). These results were fitted to Redlich-Kister type polynomial equation of the third degree to derive the binary coefficients. The standard error values were estimated between the calculated and experimental data.
Key words: Density, viscosity, ultrasonic speed, oleic acid, alkyl esters.
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