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为什么往开水里倒油不会溅起来呢

更新时间: 2020-07-03 00:00:00     

从物理的角度出发,油的沸点比水高,普通食用油沸点在200℃左右,而水是100℃。在正常大气压下,往开水里面倒油,水在沸腾时只有100℃,油的最高温度为100℃,没到沸点则不会沸腾,不会溅出来。相反的,若在沸腾的油里倒开水,超过了水的沸点,液体的沸腾就是汽化,由于温度过高,水便爆发性地汽化蒸发,导致周围的油被带得飞溅起来,。

关键词: 为什么 开水 起来

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