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1.
(2017高二上·蚌埠期末)
N2H4是一种高效清洁的火箭燃料.0.25mol N2H4(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 . N2H4(g)+ O2(g)= N2(g)+H2O(l)△H=+267kJ•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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