已知:①C(s) +O2(g) CO(g);△H =" –" 110.5 kJ · mol – 1②C(s) + O2(g) CO2(g);△H =" –" 393.51 kJ · mol – 1则反应:C(s) + CO2(g) 2CO(g)的△H为 ( )
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