起電力法によるFeWO₄およびFe₂WO₆の標準生成ギブスエネルギーの測定

抄録

The standard Gibbs free energies for the formation of FeWO₄ and Fe₂WO₆ were determined in the temperature range from 1123K to 1273K by measuring electromotive forces of galvanic cells having a solid oxide electrolyte. The results obtained are as follows:
(1) Δ_tG ^?? (FeWO₄)=-1184300+357. 6T±200 J/mol
Δ_tG ^?? (FeWO₄)=-1184300+357.4T±200 J/mol
(2) Δ_tG ^?? (Fe₂WO₆) =- 1651900+516. 1 T ±300 J/mol
Δ_tG ^?? (Fe₂WO₆)=-1651900+515.8T±300 J/mol,
where the superscript ^?? denotes that the standard pressure is 1 bar(100, 000 Pa) whereas ^?? denotes 1 atm(101, 325 Pa).