Acoustic Non-linearity Parameter of Binary Liquid Mixtures

Abstract

Non-linearity parameter (B/A) for four binary mixtures namely DPGDME + methanol, +propanol, +pentanol, +heptanol, has been computed at 298.15K. A simple method for calculating (B/A) has been employed. In this method only the values of thermal expansion coefficient (α), isothermal compressibility (βT), sound velocity (u), and heat capacity ratio (ϒ) are required. B/A for the afrosaid systems has been calculated from the knowledge of α, βT, u and ϒ which has been taken from literature. From the knowledge of (B/A) of mixture, its excess values (B/AE) were obtained. The results are discussed in terms of interactions operating in binary mixtures.