Investigation of molecular interactions & prediction of calorimetric potentials of a binary liquid system at T = 308.15 K: An insight from physicochemical parameters

Abstract

Excess values of surface tension/isothermal compressibility/internal pressure/free volume/enthalpy/entropy and Gibbs energy are computed using the experimentally measured density (ρ) and ultrasonic speed (u) for the binary liquid mixtures of dimethyl sulphoxide with acetophenone at T = 308.15 K. Activity coefficients and excess chemical potential are estimated using Morgules, Porter, Van laar and Wilson equations. The studied system shows departure to the ideality indicating the presence of weak interactions. Further, PFP theory is tested to correlative the experimental excess molar enthalpy. Moreover, PFP theory is extended to compute different derivatives of thermodynamic potentials rather calorimetric measurements. The present investigation also encompass of assessment of the acoustic non-linearity parameter (B/A) along with computation of cohesive energy, ΔA, Van der Wall's constants (a,b), distance of closest approach (d).