Abstract
The work entitled results from initial determination of physical parameters, density (ρ), speed of sound (u), refractive index of [Bmim][PF6]/ N-methylpyrrolidone and their binaries at all compositions at atmospheric pressure and at task temperatures ranging from (303.15 - 323.15) K. The experimental results were utilized for computation of molar volumes (VmE)/partial molar volumes (V¯mE)/ partial molar volumes at infinite dilution (V¯mE,∞)/isentropic compressibility (κsE)/ free length (LfE)/ speeds of sound (uE) and isobaric thermal expansion coefficient (αPE) of the binary system. Further, the binary coefficients and the standard deviations were deduced by fitting the excess properties in Redlich-Kister equation. A fortitude of these parameters indicated strong intermolecular interactions and likewise increases with increase of temperature. The results of Prigogine–Flory–Patterson (PFP) theory of excess molar volume and IR spectra were supported the deduced strong interactions.
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