Abstract
The changes in free energy, enthalpy and entropy for the dissociation and neutralization of 2-mercaptopyridine, 2-mercaptopyrimidine and 2-thiobarbituric acid have been determined at 25°C in aqueous potassium nitrate medium of 0.1 M ionic strength. The changes in dissociation free energy were calculated from dissociation constants determined potentiometrically and refined using the program MINIGLASS. The neutralization enthalpy changes were determined by direct thermometric titration, using linearization methods and the least-squares program MINITERM.
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