Experimental determination and correlation of enthalpy of mixing of binary methanol + ethyl acetate system in the presence of dissolved inorganic salts at 303.15 K

A B ST R A C T This paper presents the effect of five dissolved inorganic salts (NaCl, CaCl 2, ZnCl 2, CdCl 2 and NH 4Cl) on the endothermic enthalpy of mixing of the binary methanol + ethyl acetate system has been investigated at 303.15 K, using an isothermal batch calorimeter with vapour space. The endothermic excess enthalpies of mixing values are significantly increases for the addition of ZnCl 2, CdCl 2 and CaCl 2. For the addition of NaCl and NH 4Cl salts are insignificantly decreases the endothermic excess enthalpy values. The experimental values of the enthalpy of mixing were fitted into a Redlich – Kister equation, the deviations and parameters were reported. The experimental and correlation results reveals that the importance of the solvent- solvent and solute-solvent interaction by the enhanced excess enthalpy of mixing ( H E ) values in the positive direction with increasing concentration of the salts.