Apparent Molar Volumes of Sodium Methylbenzoates in N, N-Dimethyl Formamide–Water Mixtures at 298.15 K

Abstract

Densities of sodium methylbenzoate (o-, m-, p-) have been measured in dimethyl formamide (DMF)-water mixtures at 298.15 K with an oscillating-tube densimeter. From these densities, apparent molar volumes of sodium methylbenzoates in DMF-H 2 O mixtures have been calculated and partial molar volumes at infinite dilution have been evaluated. Substituent and solvent effects on the transfer volumes of each isomer from water to DMF-H 2 O mixed solvents have also been obtained. The results are explained in terms of solvent-solvent and solute-solvent interactions.