Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Apparent molar volumes (V?), apparent molar isentropic compression (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? 0 ) and partial molar isentropic compression (K?,s 0 ) have been determined from the above measurements. Further, these data were used to calculate the corresponding transfer parameters (?V?,s 0 and ?K?,s 0 ), hydration number (nH), side chain group contributions of V? 0 , and viscosity B coefficients of the amino acids, partial molar expansibilities (E? 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.