Apparent and partial molar heat capacities and volumes of the amino acids [formula omitted] -lysine monohydrochloride and[formula omitted] -arginine monohydrochloride in aqueous solution at temperatures from T = 288.15 K to T = 328.15 K

Abstract

Relative densities and massic heat capacities have been determined for the amino acidsl -lysine monohydrochloride and l-arginine monohydrochloride in aqueous solution at the temperatures T= (288.15, 298.15, 313.15, and 328.15) K. These data have been used to calculate apparent molar properties which, in turn, were analyzed using extended Debye–Hückel equations to yield partial molar heat capacities Cp, m, φ∞and partial molar volumes Vm, φ∞at infinite dilution. The partial molar properties have been used to calculate amino acid side-chain contributions which have been compared to those values previously reported in the literature.