The Study of Intermolecular Interactions for dl-Alanine and Glycine in Aqueous l(+)-Arabinose Solutions at Different Temperatures and Ambient Pressure, Using the Volumetric Approach

Density measurements are used to calculate the apparent molar volumes V φ , limiting apparent molar volumes V φ 0 , limiting apparent molar volumes of transfer, Δ t V φ 0 , limiting apparent molar expansibilities, E φ 0 , and hydration numbers n H , for dl -alanine and glycine in aqueous solutions of l (+)-arabinose at T = 293.15 to 313.15 K. To obtain the limiting apparent molar volume, the V φ values are extrapolated to zero molality using the linear form of the Redlich–Meyer equation. Also, the limiting apparent molar volumes of transfer, Δ t V φ 0 , for the amino acids, from water to aqueous l (+)-arabinose solutions, are calculated from the V φ 0 values. The limiting apparent molar expansibility, E φ 0 , values have been obtained from the first derivative of limiting apparent molar volumes with respect to temperature. Also the hydration number, n H , for both amino acids in the ternary solutions are estimated. Possible solute–solvent interactions in the studied ternary systems are discussed.