题目内容
|
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． |
1/2N2H4(g)＋1/2O2(g)＝1/2N2(g)＋H2O(l)；ΔH＝＋257 kJ·mol－1 |
B． |
N2H4(g)＋O2(g)＝N2(g)＋2H2O(l)；ΔH＝－133.5 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(g)；ΔH＝－534 kJ·mol－1 |
答案：D
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