investigation of thermophysical properties of amino acids solutions

thermo physical properties of three amino acids glycine, l-alanine, and l-valine have been investigated 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, v_ϕ, limiting values of apparent molar volumes, v⁰ _ϕ, and transfer volumes, δ_tv⁰ _ϕ, have been calculated from the density data. the viscosity data could be fit to the jones-dole equation, and b-coefficients and variation of b with temperature db/dt were obtained at different concentrations and temperatures. the calculated thermo physical properties data have been discussed in terms of the structure of the amino acids and their interactions with the sodium benzoate solution.