Density and viscosity of ethyl alcohol with its binary mixtures have been measured as a function of composition over the temperature range of 298.15, 303.15, 308.15, 310.15 and 313.15 K. The excess molar volume, excess viscosity, excess free energy of activation of viscous flow and interaction parameters of Grunberg and Nissan's have been calculated from the experimental data as a function of composition. All the excess functions are found to be either positive or negative over the entire range of composition depending on the molecular interaction and the nature of liquid mixtures. Further the density and viscosity data have been theoretically analyzed for the validity of several viscosity models. The main thrust of the study is to co-relate the excess properties and the relevant interaction parameters with the nature of molecular interactions between the mixing components. In this paper we report experimental data of densities (d), η, ΔG^#E, H₁₂, d₁₂, A₁₂, T₁₂ parameters of binary mixtures of ethanol - water at different temperatures.

Keyword:density, viscosity, relative viscosities, interaction parameters.

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