H2OgH2gO2的精選

問題詳情：已知2H2(g)+O2(g)=2H2O(g)△H=─484KJ/moL，則反應H2O(g)=H2(g)+O2(g)的△H為A.─484kJ/mol     B、+484kJ/mol   C.─242kJ/mol       D.+242kJ/mol【回答】D知識點：化學反應中的能量變化題型：選...