VISCOMETRIC, VOLUMETRIC AND THERMOACOUSTIC BEHAVIOUR OF AMINO ACIDS IN UREA(aq)

Measurement of density, viscosity, sound speed and refractive index has been done by established experimental procedures using pre-calibrated bicapillary pyknometer, pre-calibrated Ostwald’s viscometer, Ultrasonic interferometer and Abbe’s Refractometer respectively for the solutions of amino acid L-Arginine and L-Threonine with Urea (aq) as solvent so as to determine the type of interactions. Physical properties like density, viscosity and sound speed are useful for computing the derived parameters viz. Apparent Molal Volume ( ), Adiabatic Compressibility (?), Apparent Molal Compressibility ( ), Relative Association (RA), Hydration Number (Hn), Viscous Relaxation Time (?), Specific Acoustic Impedance (Z), Intermolecular Free Length (Lf), Limiting Apparent Molal Volume ( ), Limiting Apparent Molal Compressibility ( ), Experimental Slope (Sv* and Sk*), A and B coefficient of Jones-Dole Equation, Free energy of activation of viscous flow per mole of solvent (?µ ) and Free energy of activation of viscous flow per mole of solute (?µ ) which throw light on interactions between unlike components of multicomponent mixtures. Molar Refractivity (RD) has also been computed from Refractive Index data using Lorentz-Lorenz equation. The results are recorded at 298K, 308K in tabular and graphics manner to assess the influence of temperature on interactions between the components.