Gibbs free energy of formation of Bi2O3 from EMF cells with δ-Bi2O3 solid electrolyte |
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| Authors: | H.T. Cahen M.J. Verkerk G.H.J. Broers |
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| Affiliation: | Inorganic Chemistry Department, State University, Utrecht, Croesestraat 77A, Utrecht, The Netherlands |
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| Abstract: | Determination of thermodynamic data on the formation of Bi2O3 was established by emf measurements as a function of temperature in the range 660–820°C on the system Metal, Bi(1)|Bi2O3|Pt, O2. From the results using a tungsten electrode the following relation was found: ΔG0 = ?(134.7 ± 1.2) + (64.0 ± 1.2) × 10?3 T kcal mole?1 (validity range: 940–1080 K). Standard thermodynamic data at 298 K were calculated as ΔG0 = ?119.2 ± 2.1 kcal mole?, ΔH0 = ?139.0 ± 1.2 kcal mole?1, and ΔS0 = ?66.3 ± 1.2 eu. |
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