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Oxidation of alkaline earth sulfides to sulfates: Thermodynamic aspects

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Abstract

The emf of the galvanic cell, Pt, Ni + NiO/(CaO) ZrO2/MS + MSO4, Ir, Pt, where M is calcium, strontium, or barium, has been measured in the temperature range 850 to 1100 K. From these measurements the Gibbs’ energy changes for the oxidation of sulfides of alkaline earth metals to their respective sulfates have been calculated. The results are compared with available thermodynamic data in the literature. The agreement varies from ±2 kJ for the strontium system to ±20 kJ in the case of barium. Trends in the stabilities of alkaline earth sulfates are discussed in relation to the properties of the cationic species involved.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, University of Toronto, M5S 1A4, Toronto, Canada

    K. T. Jacob (Associate Professor)

  2. Department of Metallurgy, Indian Institute of Science, 560 012, Bangalore, India

    G. N. K. Iyengar (Associate Professor)

Authors
  1. K. T. Jacob
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  2. G. N. K. Iyengar
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Jacob, K.T., Iyengar, G.N.K. Oxidation of alkaline earth sulfides to sulfates: Thermodynamic aspects. Metall Trans B 13, 387–390 (1982). https://doi.org/10.1007/BF02667754

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  • DOI: https://doi.org/10.1007/BF02667754

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