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Densities, Viscosities and Excess Thermodynamic Properties of Monomethyl Ammonium Chloride in Tetrahydrofuran and Water Mixtures at Different Concentrations and Temperatures

Sitaram K. Chavan and Madhuri N. Hemade

Densities and viscosities of pure solvent mixtures of tetrahydrofuran–water have been measured as a function of the composition of various concentrations (0.02, 0.04, 0.06 and 0.08 m) at 298, 303, 308, 313 and 318 K. The experimental data have been used to calculate excess thermodynamic parameters such as viscosity (η E), molar volume (VE), Gibb’s free energy (ΔG*E), enthalpy (ΔH* E), entropy (ΔS* E) and Grunberg’s interaction parameter (d). The excess property values were found to be either negative or positive depending on the molecular interactions and the nature of liquid mixtures. Densities and viscosities of Monomethyl ammonium hydrochloride in tetrahydrofuran and water mixtures were also measured. The obtained results were then analysed by the Bresslau-Miller equation, Masson’s equation and Jones-Dole equation.