1998•Korean Journal of CeramicsRequires access

Free Energy of Formation of BaThO₃ from E.M.F. Measurement

Sung-Nak Choi, Hyun‐Deok Baek, Jung-Ui Hwang, Chong-Ook Park

Abstract

The Gibbs free energy of formation of BaThO₃ from elemental oxides has been measured at temperatures between 853 and 903 K using a CaF₂ solid electrolyte galvanic cell. The galvanic cell consisted of Pt, O₂, CaO+CaF₂∥CaF₂∥ BaThO₃+ThO₂+BaF₂, O₂, Pt EMF gave the standard Gibbs free energy for the reaction CaF₂+BaThO₃=CaO+BaF₂+ThO₂ as ΔG˚=123111.031-117.597 T (J/㏖).

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Key concepts: Gibbs free energy, Galvanic cell, Materials science, Electrolyte, Physical chemistry, Metallurgy, Analytical Chemistry (journal), Thermodynamics