Volumetric and Ultrasonic Properties of Liquid Mixtures of Ethyl Benzene with Alkanols at Different Temperatures

Abstract

The densities (ρ), and ultrasonic speeds (u) of pure ethyl benzene, 1-butanol, 1- pentanol, and those of their binary mixtures, with ethyl benzene as a common component, covering the whole composition range have been measured at 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K. From the experimental data the excess molar volume (V_m^Ε), deviations in isentropic compressibility (∆κ_s) and deviations in ultrasonic speed (∆u) have been determined. The sign and magnitude of these parameters were found to be sensitive towards interactions prevailing in the studied systems. The excess or deviation properties (V_m^Ε, Du, or ∆κ_s) have been correlated using a Redlich-Kister type equation to obtain their coefficients and standard deviations. The variations of derived parameters mentioned above with composition offer a convenient method to study the nature and extent of interactions between the component molecules of the liquid mixtures, which are not easily obtained by other means.