Densities and viscosities of glycine, L-alanine, L-valine, L-threonine, and L-arginine aqueous solutions of (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) mol.kg(-1) mannitol have been measured in the temperature range of (293.15 to 323.15) K under atmospheric pressure; then the measured densities and viscosities of experimental systems were correlated. These data were further used to calculate the apparent molar volumes (V-phi), the limiting partial molar volumes (V-phi(0)), the limiting partial molar volumes of transfer (Delta V-tr(phi)0), the viscosity B-coefficients, and the free energies of activation per mole of solvent (Delta mu(0 not equal)(1)) and solute (Delta mu(0 not equal)(2)). The results were interpreted through solute-solute interaction and solute-solvent interaction on the basis of the cosphere overlap model and transition state theory.