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氧气的沸点比氮气的底，为什么在分离这两种气体时氮气

2025-03-16 06:43:17

推荐回答（1个）

回答1：

氧气沸点是-183℃，氮气是-195.8℃。如果要分离2种气体，将空气温度降低到-195.8以下，就可以使2种气体都液化。再将液化空气放入-183~-195.8℃环境中，液化的氧气就可以再次气化，这样剩下的就基本是液态氮气了，而将气化的空气收集起来再次液化，那就基本是纯氧气了。

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