2. N
2H
4是一种高效清洁的火箭燃料。已知在25℃、101kPa下,8gN
2H
4(g)完全燃烧生成氮气和液态水时,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)+2H2O(g) ΔH=-534kJ·mol-1 |
B.N2H4(g)+O2(g)=N2(g)+2H2O(l) ΔH=-133.5kJ·mol-1 |
C.N2H4(g)+O2(g)=N2(g)+2H2O(l) ΔH=534kJ·mol-1 |
D.N2H4(g)+O2(g)=N2(g)+2H2O(l) ΔH=-534kJ·mol-1 |