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溶雪盐是如何化雪的

更新时间: 2020-10-13 00:00:00     

盐的冰点比水低,在雪里撒上盐颗粒或者一定浓度的盐溶液,由于盐溶解放热,因此使积雪会融化。如果没有撒盐,环境温度即使在高于0度也很不容易融化,撒盐后,提供了凝结核,温度稍微高于0度就开始融化。浓度为35%左右的盐和溶液的冰点是零下19摄氏度,浓度为20%的盐溶液的冰点为零下10度。

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