Thermophysical properties of 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide with 2-ethoxyethanol from T = (298.15 to 323.15) K at atmospheric pressure

Abstract

Density (ρ) and speed of sound (u) data is determined for various binary compositions of 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide ([Bmim][NTf2]) and 2-ethoxyethanol (2EE) at different temperatures. The experimental data of density and speed of sound is used to calculate the values of excess molar volume, excess isentropic compressibility, excess intermolecular free length and excess speed of sound. The variations in these parameters are analysed to understand the nature of molecular interactions between the chemical species. Redlich-Kister equation is used to estimate the deviations between the calculated and experimental excess values. The values of partial molar volume, excess partial molar volume and excess partial molar volume at infinite dilution have been calculated. The trends of variation of these properties have been interpreted in light of the solute-solvent interactions occurring in the system. Further, the experimental FT-IR analysis is used to study the interactions between the chemical species.