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1.N2H4是一种高效清洁的火箭燃料.0.25molN2H4(g)完全燃烧生成氮气和气态水时,放出133.5kJ热量.则下列热化学方程中正确的是
A: N2(g)+H2O(l)△H=+257kJ·mol-1
B: N2H4(g)+O2(g)=N2(g)+2H2O(l)△H=-133.5kJ·mol-1
C: N2H4(g)+O2(g)=N2(g)+2H2O(g)△H=+534kJ·mol-1
D: N2H4(g)+O2(g)=N2(g)+2H2O(g)△H=-534kJ·mol-1
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