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【简答题】
燃烧反应的利用推动了人类的进步，燃烧与我们的生活与社会的发展有着密切的联系． （1）关于燃烧条件探究的实验 ①发生的化学方程式为______ ②根据______现象能得出燃烧需要空气（或氧气）的结论； （2）燃烧与热量 ①燃料在社会发展过程中起着重要的作用，我们应合理利用能源和保护环境． 目前人类通过化学反应获得的能量大多来自于______、石油、天然气等化石燃料，天然气的主要成分为（填化学式）______．其燃烧的化学方程式为______，因为化石燃料资源有限，人类正在利用和开发潮汐能、地热能、______等新能源． ②燃煤发电时，将煤块粉碎成煤粉，其目的是______． ③目前最清洁的能源是______，没有大量使用的原因是______； ④乙醇属于______能源（填“可再生”或“不可再生”）．充分燃烧的方程式为______ ⑤化学变化通常伴随能量的变化，请写出一个为吸热反应的方程式______ （3）燃烧与灭火 火灾是燃烧最常见的危害，若加油站着火，可以用______灭火器．图书馆着火可以用______灭火器．
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