Intermolecular interactions in ternary liquid mixtures by ultrasonic measurements

Abstract

The excess adiabatic compressibility (β^E), excess free length (L_f^E), excess free volume (V_f^E) and excess internal pressure (π_i^E) have been investigated from density, ultrasonic velocity and viscosity measurements for three ternary mixtures of methyl benzoate + cyclohexane + 1-propanol, methyl benzoate + cyclohexane + 1-butanol, methyl benzoate + cyclohexane +1-pentanol and methyl benzoate + cyclohexane + 1-hexanol at 303, 308 and 313 K and atmospheric pressure, respectively over the entire range of composition. From the experimental data, adiabatic compressibility (β), free length (L_f), free volume (V_f)), internal pressure (π_i), have been calculated. The results are discussed in terms of the molecular interactions between the components of the mixture.