当水温到100度时水会迅速沸腾起来这种现象叫什么?

2025-04-06 23:49:43
推荐回答(1个)
回答(1):

有一个概念和你说的现象不一致,叫"爆沸",
由于压力突然下降,使原来处于平衡状态的饱和液,在大气压力下过热而迅速沸腾蒸发,体积急剧膨胀而显示出的一种爆炸现象,称为爆沸或蒸汽爆炸(高温饱和水则为水蒸气爆炸),极容易出现烫伤事故。
成因:
当压力容器破裂时,容器内的气体首先迅速膨胀,使容器内的压力瞬时降至大气压力。此时容器的饱和液处于过热状态,也就是说它的温度高于它在大气压力下的沸点。于是气液两相失去平衡,液体迅速大量蒸发汽化,体积急剧膨胀,容器壳体受到很高的压力冲击,使其进一步破裂。

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