Measurement and modeling of volumetric properties and speeds of sound of several mixtures of alcohol liquids containing butanediol

Abstract

Densities and speeds of sound for the pure as well as binary mixtures of 1,2-butanediol and benzyl alcohol, 2-phenylethanol, 2-butanol, and 1,3-butanediol were measured over the 0 to 1 composition range and at six different temperatures between 298.150 K and 323.150 K with an interval of 5 K and at atmospheric pressure using a vibrating tube densimeter.The experimental values were used to calculate excess molar volume, VmE, excess isentropic compressibility, KSE, excess thermal expansion coefficient, αpE, infinite partial molar volumes, V̅i∞ and excess partial molar volumes at infinite dilution, V̅iE,∞. The sign and magnitude of mixing quantities have been used to discuss the nature and strength of molecular interactions in binary mixtures. The calculated excess values and deviation quantities were fitted to the Redlich–Kister polynomials equation. Furthermore, it has been checked how the calculated values of densities and excess molar volumes using the Tao–Mason equation of state compare with the experimental ones.