Densities, Speeds of Sound, and Viscosities of (l-Proline + Aqueous Glucose) and (l-Proline + Aqueous Sucrose) Solutions in the Temperature Range (298.15 to 323.15) K

Abstract

Densities (ρ), speeds of sound (u), and viscosities (η) of l-proline in 1 mol·L–1 aqueous glucose/1 mol·L–1 aqueous sucrose solutions have been measured as a function of molal concentration of l-proline at temperatures of (298.15, 303.15, 308.15, 313.15, 318.15, and 323.15) K. Using the ρ and u data, the partial molar volumes (ϕvo), transfer partial molar volumes (Δtrϕvo), isentropic compressibilities (κs), partial molar isentropic compressibilities (ϕko), and transfer partial molar isentropic compressibilities (Δtrϕko) have been computed. The viscosity B-coefficients of the Jones–Dole equation also have been computed. The κs values decrease with increase in molal concentration of l-proline and also with increase in temperature. The ϕvo increase and ϕko decrease with an increase in temperature. The Δtrϕvo values increase and Δtrϕko values decrease with an increase in temperature. The trends of variations of experimental and computed parameters have been discussed in terms of hydrophilic–ionic group and hy...