Temperature dependence of excess molar volumes, (partial derivativeVE/partial derivativeT) and deviation in isentropic compresibilities of binary liquid mixtures of benzene with chloroalkanes

Excess molar volumes, V-E, their temperature derivative, (partial derivative V-E/partial derivative T), and deviation in isentropic compressibilities, Delta k(s) of liquid mixtures of benzene with 1,2-dichloroethane and 1,1,2,2-tetrachloroethane have been calculated using the experimentally measured densities, p and ultrasonic speeds, u of the pure liquids and those of their mixtures over the whole composition range and at 298.15, 303.15, 308.15, 313.15 and 318.15 K. Thermal expansion coefficient, alpha, excess thermal expansion coefficietu, alpha(E) partial molar volumes at infinite dilution, (V) over bar (0)(1), (V) over bar (0)(2) and partial molar isentropic compressibilities at infinite dilution, 910 and 920 have also been calculated. All properties have been correlated with standard polynomials against temperature and composition, and the excess/deviation functions have been correlated using Redlich-Kister polynomial. Moreover, (partial derivative V-E/partial derivative T) and Delta k(s) have also been estimated from Flory's theory and Benson-Kiyohara theory, respectively. A(i) coefficients of Redlich-Kister equation were also used to calculate the partial molar volumes. Good approximation has been obtained between the theory and experiment. (C) 2007 Elsevier B.V All rights reserved.