For the reducation of lead oxide by coke
(PbO +C → Pb + CO), AH and AS are found to be
108.8 kJ mol-1 and 190 JK-1 mol-1 respectively.
The minimum temperature above which the
reaction will be spontaneous will be
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When the temperature rises above 273 K, the process becomes spontaneous because the larger T value has tipped the sign of ΔG over to being negative.
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