为什么水会在沸点时变成蒸汽？[^2^]内容如下：

水会在沸点时变成蒸汽，是因为水分子在高温下运动得更快，从而克服了液体之间的相互吸引力，逃逸到空气中。水的沸点是指水在一定的大气压力下，从液态变成气态的温度。水的沸点随着大气压力的变化而变化，例如，在海平面上，水的沸点是100摄氏度，而在海拔高的地方，水的沸点会降低，因为大气压力较低。水的沸点也受到水中溶解物的影响，例如，加入盐的水的沸点会比纯水的沸点高，因为溶解物会降低水的汽化压。

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