INVESTIGATION OF THERMOPHYSICAL PROPERTIES OF AMINO ACIDS SOLUTIONS

Thermo physical properties of three amino acids glycine, L-alanine, and L-valine have beeninvestigated in aqueous solutions of (0.1, 0.3, and 0.5) mol•L-1 sodium benzoate at the temperatures(303.15, 308.15, and 313.15) K. Apparent molar volumes, Vϕ, limiting values of apparent molarvolumes, V0 ϕ, and transfer volumes, ΔtV0 ϕ, have been calculated from the density data. The viscositydata could be fit to the Jones-Dole equation, and B-coefficients and variation of B with temperaturedB/dT were obtained at different concentrations and temperatures. The calculated thermo physicalproperties data have been discussed in terms of the structure of the amino acids and their interactionswith the sodium benzoate solution.

Keywords:

amino acids , sodium benzoate , density , viscosity , apparent molar volume