Abstract

VOLUMETRIC BEHAVIOUR OF BINARY MIXTURES OF ETHANOL AND METHANOL AT 303 AND 308K

Nleonu E. C.*, Ezeibe, A. U., Onwusonye J.C., Okeke P. I. and Ibeh G. C.

Abstract

This research work was undertaken to examine the molecular interaction between binary mixture of ethanol and methanol by determing the densities (ρ), viscosity deviation (Δη), excess viscosity (ղE), molar volume (Vm), Excess Molar Volume (VE) and excess Gibb’s free energy (ΔGE) at 303 and 308K over the entire composition mole fractions. The excess properties were found to be either negative or positive depending on the mole fractions of the mixtures. The positive value of Excess Molar Volume (VE) shows volume expansion on mixing indicating weaker interactions than the interactions of the pure solvents. This work is of significance to the law enforcement agencies in monitoring alcohol producers against adulteration of ethanol products.

Keywords: Binary mixture, Density, Viscosity, Molar volume, Thermodynamic parameter.