From the values given for ∆H° and ∆S°, calculate ∆G° foreach of the following reactions at 298 K. If the reactionis not spontaneous under standard conditions at 298 K,at what temperature (if any) would the reaction becomespontaneous?(a) 2 PbS1s2 + 3 O21g2 ¡ 2 PbO1s2 + 2 SO21g2∆H ° = -844 kJ; ∆S° = -165 J>K(b) 2 POCl31g2 ¡ 2 PCl31g2 + O21g2∆H° = 572 kJ; ∆S° = 179 J>K

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From the values given for ∆H° and ∆S°, calculate ∆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) 2 PbS1s2 + 3 O21g2 ¡ 2 PbO1s2 + 2 SO21g2
∆H ° = -844 kJ; ∆S° = -165 J>K
(b) 2 POCl31g2 ¡ 2 PCl31g2 + O21g2
∆H° = 572 kJ; ∆S° = 179 J>K

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