下列各組熱化學(xué)方程式中,化學(xué)反應(yīng)的△H前者大于后者的是( ?。?br />①C(s)+O
2(g)═CO
2(g)△H
1 C(s)+
O
2(g)═CO(g)△H
2②S(s)+O
2(g)═SO
2(g)△H
3 S(g)+O
2(g)═SO
2(g)△H
4③H
2(g)+
O
2(g)═H
2O(l)△H
5 2H
2(g)+O
2(g)═2H
2O(l)△H
6④CaCO
3(s)═CaO(s)+CO
2(g)△H
7 CaO(s)+H
2O(l)═Ca(OH)
2(s)△H
8.