1．(2015·徐州、宿迁、连云港三市三模)已知：
①2CH3OH(g)＋3O2(g)===2CO2(g)＋4H2O(l) ΔH1
②2CO(g)＋O2(g)===2CO2(g) ΔH2
③2H2(g)＋O2(g)===2H2O(l) ΔH3
④2H2(g)＋O2(g)===2H2O(g) ΔH4
⑤CO(g)＋2H2(g)===CH3OH(g) ΔH5
下列关于上述反应焓变的判断正确的是( )
A．ΔH1>0，ΔH2<0
B．ΔH3>ΔH4
C．ΔH1＝ΔH2＋2ΔH3－ΔH5
D．2ΔH5＋ΔH1<0
