Question: From the values given for ÎH° and ÎS°, calculate ÎG° for each of the following reactions at 298 K. If the reaction is not spontaneous

From the values given for Î”H° and Î”S°, calculate Î”G° for each of the following reactions at 298 K. If the reaction is not spontaneous under standard conditions at 298 K, at what temperature (if any) would the reaction become spontaneous?
(a)

(b)

2PbS(s) + 302(g)-2 PbO(s) + 2SO2(g) 2POCl3(g)2PCl3(g) O2(8)

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