火箭推进器常以联氨(N
2H
4) 为燃料、过氧化氢为助燃剂。已知下列各物质反应的热化学方程式:
N
2H
4(g)+O
2(g)=N
2(g)+2H
2O(g) Δ
H1=-533.23 kJ·mol
-1 H
2O(g)=H
2O (l) D
H2=–44 kJ·mol
-12H
2O
2(l)=2H
2O(l)+ O
2(g) D
H3=–196.4 kJ·mol
-1则联氨与过氧化氢反应的热化学方程式可表示为
A.N2H4(g)+2H2O2(l)= N2(g)+4H2O(l)ΔH=+817.63 kJ·mol-1 |
B.N2H4(g)+2H2O2(l)= N2(g)+4H2O(g)ΔH=-641.63 kJ·mol-1 |
C.N2H4(g)+2H2O2(l)= N2(g)+4H2O(l)ΔH=-641.63 kJ·mol-1 |
D.N2H4(g)+2H2O2(l)= N2(g)+4H2O(g)ΔH=-817.63 kJ·mol-1 |