Salt effect on the enthalpy of mixing of water+methanol at 303.15 K

Abstract

The excess enthalpy of the miscible water–methanol system has been measured at 303.15 K in an isothermal batch calorimeter with vapour space. The effect of the salts NH 4Cl, CdCl 2 and HgCl 2 on H E was studied. A decreasing trend in excess enthalpy for NH 4Cl and HgCl 2 but an increasing trend for CdCl 2 with increasing salt concentrations have been observed. The experimental values of H E have been correlated using a modified Redlich–Kister equation and the binary parameters have been estimated. The deviations were calculated and reported.