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Determination of Thermodynamic Functions for Ion Association of Hippuric Acid in 20% Aqueous Ethanol

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Author Affiliations

  • 1Department of Chemistry, College of Science, University of Mosul, Mosul, Iraq

Res.J.chem.sci., Volume 6, Issue (2), Pages 15-22, February,18 (2016)

Abstract

Track conductivity of Hippuric acid in the range of low concentrations in 20% aqueous ethanol at (293.15, 298.15, 303.15 and 308.15) K. Then processing the experimental results by Lee-Wheaton model to determining some functions of electrolytic conductivity as: sum of activity coefficient "∑∱±", sum of degree of dissociation "∑α", sum of calculated value of equivalent conductivity "∑∧caleq", equivalent conductivity at infinite dilution "∧oeq" and association constant "KA". Moreover, standard thermodynamic parameters of association (standard value of the change in: Gibbs free energy "ΔGoA", Enthalpy "ΔHoA", and Entropy "ΔSoA") for the acid.

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