Density and Viscosity of Tetrapentyl Ammonium Iodide in Binary Mixture of N, N-imethylformamide and Ethylmethylketone at Different Temperatures
Journal Title: International Journal of Science and Research (IJSR) - Year 2015, Vol 4, Issue 2
Abstract
Density (ρ) and Viscosities(η) of tetrapentylammonium iodide (Pen4NI) in N,N-Dimethylformamide (DMF), ethylmethyl ketone (EMK) and DMF + EMK solvent mixtures containing 0, 20, 40, 60, 80 and 100 mol % of DMF at 298, 308 and 318K have been reported. The experimental values of Density (ρ) and Viscosities (η) were used to calculate the values of the apparent molar volume (ϕv), partial molar volume (ϕvo) at infinite dilution. The viscosity data have been analysed in terms A- and B- viscosity coefficients of the Jones Dole equation. Both A- and B coefficients have found to be positive over the entire solvent composition range at all temperatures. The activation parameters have been examined as a function of solvent composition to interpret the solution behaviour of tetraethyl ammonium bromide (Pen4NI) in binary mixture of DMF-EMK. The behaviuor of these suggests strong ion-solvent interactions in these systems and that Pen4NI act as structure-maker in EMK+DMF mixed solvents.
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