判断a、b、c三者关系正确的是( )
2Cu(s)+O2(g)=2CuO(s) ΔH=−314kJ·mol−1
2Cu2O(s)+O2(g)=4CuO(s) ΔH=−292kJ·mol−1
则CuO(s)+Cu(s)=Cu2O(s)的ΔH等于( )