The study of volumetric, acoustic and transport properties of ionic liquid, 1-butyl-3-methyl imidazolium chloride [Bmim][Cl] in aqueous lithium bromide solutions at T = 298.15–318.15 K

• Effect of [Bmim][Cl] on densities and viscosity of aqueous LiBr solutions at T = 298.15, 303.15, 308.15, 313.15, and 318.15 K is studied.
• A negative transfer volume of (BmimCl) from water to the aqueous LiBr solutions is observed.
• The viscosity values of [Bmim][Cl] in aqueous solutions of LiBr are larger than those in pure water.

We studied the effect of ionic liquid, 1-butyl-3-methyl imidazolium chloride on thermodynamic and transport properties of aqueous lithium bromide solutions. In this work, densities, speed of sound and viscosity of these systems at 298.15, 303.15, 308.15, 313.15, and 318.15 K have been measured. The apparent molar volume, isentropic compressibility, apparent isentropic compressibility and relative viscosity values have been evaluated from the experimental density, speed of sound and viscosity data. Redlich–Mayer equation has been applied for correlating the apparent molar volumes and apparent molar isentropic compressibility values in dilute region. Viscosity data in the whole concentration range were correlated to a semi-empirical equation. The viscosity B-coefficients were obtained by fitting viscosity data to Jones–Dole equation. It is well established that viscosity B-coefficient is a measure of solute–solvent interactions, and is directly dependent on the size, shape and charge of the solute molecules.

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