用图所示的装置给烧瓶中的水加热,烧瓶中的水沸腾后移去酒精灯,

用图所示的装置给烧瓶中的水加热,烧瓶中的水沸腾后移去酒精灯,水停止了沸腾。若不用加热的方法,要使水重新沸腾,你应该怎样做(写出一种方法):该方法的依据是:

答案

方法:抽去烧瓶内的部分气体(或将瓶加盖后倒置浇冷水)。

道理:气压减小,沸点降低

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