Study of excess thermodynamic properties of multicomponent liquid mixtures

Ultrasonic velocity and density of four ternary liquid systems have been determined experimentally at 298.15 K. All the four ternary systems comprise of a polar molecule, viz., chlorobenzene or chloronapthalene (first component) and a mixture of two alkanes (second and third component) consisting of different size and shapes. Excess molar volume has been calculated and these values along with the other computed parameters, viz., KSE, KTE, uE, ΔV and δu have also been computed. The main aim of the present investigation is to study the influence of a polar molecule in terms of size, shape and polarity to a mixture of hydrocarbons (binary) on the experimental and thermodynamic excess properties.