硫化鑛製錬に關する基礎的研究(第12報) : 固態三硫化蒼鉛の水素に依る還元平衡に就いて

概要

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The equilibrium in the reduction of solid bismuth trisulphide by hydrogen was measured by means of the flow method. First, some considerations were given to the adopting of the flow method at lower temperature and also to the formulas concerning the dissociation of hydrogen sulphide gas. In the experimental temperature range from 294° to 366℃, the effect of temperature upon the equilibrium constant and the standard free energy change for the reaction were determined as follows : [chemical formula] By combining these equations with the known ones for hydrogen sulphide gas, the dissociation pressure and the standard free energy change in the dissociation of solid bismuth trisulphide were given as a function of temperature by the following equations : [chemical formula] Using these results and other thermodynamical data, the heat change and the standard free energy change of formation of solid bismuth trisulphide were estimated to be -61,310 and -53,920 cal respectively. And comparing these values with the published ones, some theoretical considerations were made.
東北大学の論文
1952-09-10