已知：①2Cu2S(s)＋3O2(g)===2Cu2O(s)＋2SO2(g) ΔH＝－768.2kJ·mol－...
问题详情：已知：①2Cu2S(s)＋3O2(g)===2Cu2O(s)＋2SO2(g)ΔH＝－768.2kJ·mol－1②2Cu2O(s)＋Cu2S(s)===6Cu(s)＋SO2(g)ΔH＝＋116.0kJ·mol－1则Cu2S(s)＋O2(g)===2Cu(s)＋SO2(g)ΔH＝___________________________________。【回答】*－217.4kJ·mol...