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为什么撒盐就可除冰
更新时间: 2020-09-23 00:00:00  

水的温度达到0摄氏度时,就会结冰。如果加入盐,结冰温度就会降低:百分之10的盐溶液会使凝点降到零下6摄氏度,百分之20的盐溶液会使凝点降到零下16摄氏度。这就意味着如果把盐撒在结冰的道路上,就可以让冰融化。盐可以溶解到冰里的液体水中,降低凝点,从而起到除冰的效果。

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