已知：①H2(g)＋
O2(g)＝H2O(g) △H1＝a kJ·mol－1
②2H2(g)＋O2(g)＝2H2O(g) △H2＝b kJ·mol－1
③H2(g)＋O2(g)＝H2O(l) △H3＝c kJ·mol－1
④2H2(g)＋O2(g)＝2H2O(l) △H4＝d kJ·mol－1
下列关系式中正确的是
| A．a＜c＜0 | B．b＞d＞0 | C．2a＝b＜0 | D．2c＝d＞0 |
已知：①H2(g)＋O2(g)＝H2O(g) △H1＝a kJ·mol－1
②2H2(g)＋O2(g)＝2H2O(g) △H2＝b kJ·mol－1
③H2(g)＋O2(g)＝H2O(l) △H3＝c kJ·mol－1
④2H2(g)＋O2(g)＝2H2O(l) △H4＝d kJ·mol－1
下列关系式中正确的是
| A．a＜c＜0 | B．b＞d＞0 | C．2a＝b＜0 | D．2c＝d＞0 |
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