85问答库 > 甲醇是一种重要的化工原料，有着重要的用途和应用前景．工业生产甲醇的常用方法是：CO（g）+2H2（g）═CH

甲醇是一种重要的化工原料，有着重要的用途和应用前景．工业生产甲醇的常用方法是：CO（g）+2H2（g）═CH

2025-03-14 21:56:38
推荐回答（1个）
回答1：

①根据燃烧热概念，结合热化学方程式，2H2（g）+O2（g）=2H2O （l）△H=-571.6kJ/mol，氢气的燃烧热为：H2（g）+
1
2
O2（g）=H2O （l）△H=-285.8kJ/mol，所以氢气的燃烧热为285.8KJ/mol，故答案为：-285.8KJ/mol；
②（1）CO（g）+2H2（g）?CH3OH（g）△H=-90.8kJ/mol，（2）H2（g）+
1
2
O2（g）=H2O（g）△H=-241.8kJ/mol；
（2）×2-（1）得到：CH3OH（g）+O2（g）?CO（g）+2H2O（g）△H=-392.8 kJ/mol，
故答案为：-392.8 kJ/mol．

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