已知：①2H₂(g)＋O₂(g)＝2H₂O (g)          △H₁
②3H₂(g)＋Fe₂O₃(s)＝2Fe(s)＋3H₂O (g)  △H₂
③2Fe(s)＋3/2O₂(g)＝Fe₂O₃(s)         △H₃
④2Al(s)＋3/2O₂(g)＝Al₂O₃(s)         △H₄
⑤2Al(s)＋Fe₂O₃(s)＝Al₂O₃(s)＋2Fe(s)  △H₅
下列关于上述反应焓变的判断正确的是

A．△H1＜0，△H3＞0	B．△H5＜0，△H4＜△H3
C．△H1＝△H2＋△H3	D．△H3＝△H4＋△H5