The effect of two dissolved inorganic salts

cadmium chloride CdCl

2

and ammonium chloride NH

4

Cl

on the excess enthalpy of mixing(

H

E

) of the binary system methanol + benzene measured at 303.15 K using an isothermal displacement calorimeter with vapor space is investigated in the present work. Compared to the salt-free system

a decreasing trend in the endothermicity of

H

E

values is significant with the addition of CdCl

2

salt but the decrease in the

H

E

values is insignificantly smaller with the addition of NH

4

Cl salt. The experimental values of the enthalpy of mixing are fitted into a Redlich-Kister equation and the deviations in the values and the parameters are reported. The importance of the solute-solvent interactions and the solvent-solvent interactions are demonstrated from the increasing excess enthalpy of mixing values in the positive direction with the increase of salt concentration.