17.from the values given for △H and △S at 298K,which of the following
reactions are spontaneous under standard condition at 298K?
(a)2PbS(s)+3O2(g)→2PbO(s)+O2(g) △H=-844kJ △S=-165J/K
(b)2POCl3(g)→2PCl3(g)+O2(g) △H=572kJ △S=179J/K
(c)N2(g)+3F2(g)→2NF3(g) △H=-249kJ △S=-278J/K
(d)N2(g)+3Cl2(g)→2NCl3(g) △H=460kJ △S=-275J/K
(e)N2F4(g)→2NF2(g) △H=85kJ △S=198J/K
謝謝^^
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