The Evaluation of the Thermodynamic Parameters of Viscous Flow in Dimethylformamide-Water Mixtures for Chlorides and Bromides of Calcium, Strontium and barium at Different Temperature

Abstract

The thermodynamic parameters of viscous flow, namely: ΔE*, ΔF* and ΔS* at 30º and 40ºC have been calculated for the chlorides and bromides of calcium, strontium and barium in DMF-water mixtures of various compositions using the method of Nightingale and BencK's equations based on the application of Eyring's theory of absolute reaction rate. The data has been utilised to discuss the ion-solvation in mixed solvent. The value for ΔE* and ΔF* increases with the solvent composition and decreases with the rise of temperature for all the electrolyte solutions. ΔS* value decreases with solvent composition as well as with the rise of temperature for all the electrolyte solutions.