听力原文:W: Hey, George! What are you doing sitting in the car all by yourself? M: Oh, I'm just killing time. Traffic was unusually light, so I came a bit early. Q: What do we know about George? (18)
【简答题】北京时间2013年12月2日凌晨1时30分,我国的“嫦娥三号”月球探测器在西昌卫星发射中心发射升空,发射“嫦娥三号”月球探测器的火箭推进器中装有还原剂肼(N 2 H 4 )和氧化剂N 2 O 4 ,当它们混合时,即产生大量的氮气和水蒸气,并放出大量的热。已知0.4 mol气态肼和足量N 2 O 4 气体反应生成氮气和水蒸气时放出219.3 kJ的热量。 (1)写出肼和N 2 O 4 反应的热化学方...