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我们在学习蒸发与沸腾的时候,书上有这样一段话:“液体蒸发时温度降低,说明它要从周围的物体吸收热量。因此液体蒸发有致冷作用。”有的同学对这句话的理解是:有“致冷作用”,就是液体蒸发需要从外界环境吸热,不从外界环境吸热液体就不能蒸发,这样理解是不对的。液体蒸发与液体吸热之间并没
When we learned to evaporate and boil, there was a saying in the book: “When the liquid evaporates, the temperature decreases, indicating that it absorbs heat from the surrounding objects. Therefore, the evaporation of liquid has a cooling effect.” Some students understand this sentence. Yes: There is a “cooling effect”. That is, the evaporation of liquid needs to absorb heat from the outside environment. It cannot be evaporated without absorbing liquid from the outside environment. This understanding is wrong. No difference between liquid evaporation and liquid heat absorption