STUDY of THERMO ACOUSTICAL AND THERMODYNAMICS PARAMETERS OF STRONG ELECTROLYTES IN MIXED SOLVENT SYSTEMS AT DIFFERENT TEMPERATURES

Abstract

Ultrasonic wave is a non-destructive and mechanical wave, which behaves like a newlineprobe to investigate molecular, physico-chemical, mechanical and optical properties of newlinematerials. The ultrasonic wave is a high frequency (gt20kHz) and low amplitude wave. newlineDue to its penetrating nature through liquid medium it can interact with the matter to newlinestudy the molecular kinetic properties of the materials. Theoretical and experimental newlinestudy of ultrasonic wave propagation has given rise to renewed interest in this field. newlineUltrasonic velocity measurements are helpful to study the ion-solvent interactions in newlineaqueous and non-aqueous solutions. Ultrasound has been extensively used to determine newlinethe ion-solvent interactions in aqueous solutions containing electrolytes. The uses of newlineethanol + water, methanol + water and acetone + water mixtures have attracted much newlineattention in recent years as a solvent in the study of physico-chemical properties of newlineelectrolytic solutions. The solvent properties like viscosity have also been taken into newlineaccount in determining the extent of ionic association and the solute-solvent interactions, newlinewhich enabled us to interpret the unique structure of the solvent. It has been found that, newlinethe addition of electrolyte could either break or make the structure of a liquid. Because newlinethe viscosity of liquid depends on the intermolecular forces, the structural aspects of the newlineliquid can be inferred from the viscosity of solvents at different concentrations and newlinetemperatures. The temperature and concentration dependence of viscosity of aqueous newlineelectrolyte solutions help us to understand ion-solvent and long range ion-ion electrostatic newlineinteractions. The Jones-Dole viscosity co-efficients are important in the description and newlineunderstanding of ionic process. newlineElectrolytes dissolving in water have been classified as structure maker or structure newlinebreaker, depending on the charge density. It has been reported that ions with low charge newlinedensity are net structure breaker and ions with a high charge density show an opposite newlinebehavior and