A:消去→加成→取代
B:加成→消去→取代
C:取代→消去→加成
D:消去→加成→消去
C(s)+ 12 O2(g)=CO(g)△H1=﹣110.5kJ/mol
C(s)+O2(g)=CO2(g),△H2=﹣393.5kJ/mol
则C(s)+CO2(g)=2CO(g)的△H 为( )
—In two days.