Speed of sound, isentropic compressibilities, and excess molar volumes of binary mixtures containing p-dioxane

The speed of sound u in and densities rho of eight binary mixtures of p-dioxane (p-C4H8O2) with methylcyclohexane (c-C6H11CH3), 1-chlorohexane (C6H13Cl), 1-bromohexane (C6H13Br), p-xylene [C6H4(CH3)(2)], propylbenzene (C6H5C3H7), methyl acetate CH3COOCH3), butyl acetate (CH3COOC4H9), and amyl acetate (CH3COOC5H11) were measured over the whole composition range at 30 degrees C. Isentropic compressibilities (K-s), Rao's molar sound functions (R), excess molar volumes (V-E), excess isentropic compressibilities (K-S(E)), together with relative change in volume Delta V/phi(1)phi(2) values, have been obtained for all measured mole fractions. The excess partial molar volume (V-1-V-1(0)) of p-dioxane in different solvents have also been estimated. The experimental results have been analyzed in terms of the Prigogine-Flory-Patterson theory of solutions.