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。则下列热化学方程式中正确的是( )
放出133.5 kJ热量。则下列热化学方程式中正确的是( )
A：N2H4(g)＋O2(g)====N2(g)＋H2O(g)；ΔH=＋267 kJ·mol－1
B：N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =－534 kJ·mol－1
C：N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =＋534 kJ·mol－1
D：N2H4(g)＋O2(g)====N2(g)＋2H2O(l)；ΔH =－133.5 kJ·mol－1
答案(点此获取答案解析）
B
