為什麼風可以加快水的蒸發?

2009-02-18 6:01 am
為什麼風可以加快水的蒸發?
原因?????????

回答 (2)

2009-02-19 2:32 am
✔ 最佳答案
呢個我本PHY書都有講過既- -
蒸發係快速運動中的粒子從液體表面「走佬」既現象
液體既粒子以不同的速度運動緊
好似人撞人咁 有D粒子會增加動能 有D粒子失去動能
只要D粒子有足夠動能就會「走佬」 形成蒸發
呢個就係蒸發 好似有D問非所答添= =
返正題啦 如果有風的話 從水的表面逃逸的水粒子(即係果D差少少就走到佬既粒子)就會被吹走 小D運動快速既粒子,粒子既平衡動能下降,液體也會變冷 同時形成蒸發
所以,風增加了蒸發率
參考: 我的腦袋
2009-02-18 8:32 pm
Water evaporates because those higher energy water molecules at the surface escape into the air. But at the same time, some of the escaped molecules, because of their random motion, have a chance of returning to the water.
Air movement above water surface tends to carry away the escaped water molecules, thus reducing the number of molecules that would return to the water. That is to say, the number of water molecules leaving the water now becomes more than if there is no air movement. The water thus is observed to evaporate at a faster pace.



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