Question

if evaporation leads to cooling so why we feels much cold with cool water than hot water?
explain on the basis of evaporation.

Answer 1

Liquid evaporating from a surface has a cooling effect. And different liquids have this effect to different degrees. For example, rubbing alcohol has more of an evaporative cooling effect than water. Alcohol evaporates comparatively more quickly than water, so scientists class it as a "volatile" liquid. But regardless of the liquid, they all follow the same principle of evaporative cooling. In its liquid state, the substance—whether water or alcohol—has a certain heat content, which is central to the process. Also critical to this are two of the three basic phases of matter: liquid and vapor. (The solid phase is, of course, the third.)

Answer 2

we feel much more cold with cold water because already when the water is cold, evaporation of cold water takes a longer time,hence the cold feeling persists for long. and then even when the cold wateris evaporating, it causes further cooling thus intensifying the coldness. but for hot water only the cooling effect leads to feel cool. thus, we feel much more cold with cold water rather tgan hot water.





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