题目

When you are in another country, it is important to know the language, but it is equally important to know how to communicate nonverbally(非语言地), before saying anything by making gestures. According to a pioneer in nonverbal communication, only 30 to 35 percent of our communication is verbal. When people don't know the language, the most common way to communicate is through gestures. However, many gestures have different meanings, or no meaning at all, in different parts of the world. In the United States, for example, nodding your head up and down means “yes”. In some parts of Gree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（N2H4）和氧化剂N2O4，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0.4mol气态肼和足量N2O4气体反应生成氮气和水蒸气时放出219.3kJ的热量．（1）写出肼和N2O4反应的热化学方程式： ；（2）已知H2O（l）═H2O（g）△H=+44kJ?mol-1，则16g气态肼与足量N2O4气体反应生成氮气和液态水时，放出的热量是 ；（3）肼除应用于火箭燃料外，还可作为燃料电池的燃料，由肼和空气构成的碱性燃料电池的负极反应式为： ，正极反应式为： ；（4）向次氯酸钠溶液中通入一定物质的量的氨气可生成肼，写出反应的离子方程式： ．