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

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 and apparent molar heat capacities The volume of ionization (ΔV 0 ) and heat capacity of ionization (ΔC P 0 ) 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.