Abstract
The reduction equilibrium of sulphur in molten lead by hydrogen was investigated in the temperature range of 800∼950°C. It is concluded that sulphur in molten lead may be regarded as an ideal solution within the limit of experiment. Experimental results are summarized as follows: & S(% in Pb)+H_2 \
ightleftarrowsH_2S;
& K=P_H_2S/P_H_2[S% in Pb]=K_p/[S% in Pb],
& logK=-2,243/T+0.342,
& ΔF°=10,285-1.565T
By combining the dissociation equilibrium of hydrogen sulphide with the above results, the following results were obtained: & 2S(% in Pb) \
ightleftarrowsS_2; K’=P_S_2/[S% in Pb]^2,
& logK’=-13,949/T+5,838,
& ΔF°=63,817-26.709T.
