Standard enthalpies of formation of sulfosalicilates of calcium, magnesium, zinc and aluminium

K V RAJAGOPALAN, R KALYANARAMAN, M SUNDARESAN

Abstract


Standard enthalpies of formation of sulfosalicylates of calcium, magnesium, zinc and aluminium have been determined by rotating bomb oxygen calorimetry and the mean dissociation enthalples of the respective M-O bonds have been computed using suitable empirical thermochemical cycles. The homolytic and heterolytic contributions to the mean disruption enthalpies have been  calculated and the effect of the introduction of the sulphonyl group into salicylic acid on the dissociation energies has been investigated.

Keywords


Rotating bomb calorimetry; combustion; sulfosalicylates; Ca; Mg; Zn; Al; enthalples of formation; enthalpies of chelation in gaseous and condensed phases; M-O bond; mean-bond dissociation enthalples.

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