名校
1 . 已知(1)H2(g)+
O2(g)=H2O(g)；△H1=akJ·mol-1
(2)2H2(g)+O2(g)=2H2O(g)；△H2=bkJ·mol-1
(3)H2(g)+O2(g)=H2O(l)；△H3=ckJ·mol-1
(4)2H2(g)+O2(g)=2H2O(l)；△H4=dkJ·mol-1
下列关系式中正确的是
O2(g)=H2O(g)；△H1=akJ·mol-1(2)2H2(g)+O2(g)=2H2O(g)；△H2=bkJ·mol-1
(3)H2(g)+
O2(g)=H2O(l)；△H3=ckJ·mol-1(4)2H2(g)+O2(g)=2H2O(l)；△H4=dkJ·mol-1
下列关系式中正确的是
| A．a＜b＜0 | B．b＞d＞0 | C．2a=b＜0 | D．2c=d＞0 |
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