Journal of Chemical and Engineering Data, Vol.60, No.9, 2600-2611, 2015
Densities, Sound Speed, and Viscosities of Some Amino Acids with Aqueous Tetra-Butyl Ammonium Iodide Solutions at Different Temperatures
Apparent molar volumes (V-emptyset), apparent molar isentropic compression (K-emptyset,K-s), and viscosity B coefficient of glycine, L-alanine, and L-valine in (0.01 and 0.03) mol.kg(-1) aqueous tetrabutyl ammonium iodide (TBAI) solutions have been determined at temperatures (288.15, 293.15, 298.15, 303.15, and 308.15) K from their experimental density, ultrasonic speed, and flow time measurements, respectively. Partial molar volumes (V-emptyset(0)) and partial molar isentropic compression (K-emptyset,s(0)) have been determined from the above measurements. Further, these data were used to calculate the corresponding transfer parameters (Delta V-emptyset,s(0) and Delta K-emptyset,s(0)), hydration number (n(H)), side chain group contributions of V-emptyset(0), and viscosity B coefficients of the amino acids, partial molar expansibilities (E-emptyset(0)), (dB/dT), and related parameters. The trends of variations of experimental and computed parameters have been discussed in terms of solute-solvent interactions with an emphasis on structure-making and structure-breaking ability of the above amino acids in the solvent mixture.