题干
N2H4是一种高效清洁的火箭燃料。0.25 mol N2H4（g）完全燃烧生成氮气和气态水时，放出133.5 kJ热量。则下列热化学方程中正确的是
A：1/2 N2H4(g)+ 1/2 O2(g)＝ 1/2 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
答案(点此获取答案解析）
D
