Volumetric and acoustic investigation of l-leucine and N-acetyl l-leucine in the aqueous solution of 1-hexyl-3-methylimidazolium bromide [HMIm] [br] at different temperatures

Present study reports density (ρ) and ultrasonic velocity (c) for l-leucine and N-acetyl l-leucine in (0.00, 0.005, 0.01, 0.03 and 0.05) mol.kg−1 aqueous solutions of 1-hexyl-3-methylimidazolium bromide [HMIm] [Br] at T = (288.15, 298.15, 308.15 and 318.15) K. Experimental data for density and ultrasonic velocity were used to calculate the apparent molar volumes (Vϕ), the apparent molar volumes at infinite dilution (Vϕ0), partial molar...