Molecular interaction study of binary mixtures of methyl benzoate: Viscometric and ultrasonic study

Abstract

Densities ( ρ), viscosities ( η) and ultrasonic speeds ( u) of binary mixtures of methyl benzoate with benzene, isopropyl benzene, isobutyl benzene, acetophenone, cyclopentanone, cyclohexanone or 3-pentanone including those of pure liquids were measured over the entire composition range at temperatures 303.15 and 313.15 K respectively. The excess molar volumes ( V E ) and the other excess thermodynamic properties such as deviations in isentropic compressibilities (Δ k s ), ultrasonic speed (∆ u), viscosity (∆ η) and excess free energy of activation (∆ G ⁎ E ) were calculated using the experimentally measured ρ , η and u respectively. The experimental mixture viscosities were analyzed on the basis of Tamura–Kurata, Heric (2-Parameter), Eyring–Margules and Jouyban–Acree models. A good agreement among experimental data and the values estimated by theoretical procedure was obtained.