The volumetric and thermochemical properties of L-ascorbic acid in water at 288.15, 298.15, and 308.15 K

Abstract

Measurements have been made at 288.15, 298.15, and 308.15 K with a flow microcalorimeter and densimeter to obtain heat capacities and densities for L-ascorbic acid and sodium chloride in water. These data are reported in terms of apparent molar volumes [Formula: see text] and apparent molar heat capacities [Formula: see text] The volume of ionization (ΔV0) and heat capacity of ionization (ΔCP0) for the acid at 298.15 K have been calculated using a method that does not require volumetric and thermochemical data for the sodium salts of the acid. Details of our methodology are presented.