You may have noticed that when you get out of a swimming pool and stand dripping wet in a light breeze,you feel much colder than you feel after you dry off.Why is this?
A)The moisture on your skin has good thermal conductivity.
B)Water has a relatively large heat capacity.
C)This is a purely psychological effect resulting from the way in which sensory nerves in the skin are stimulated.
D)The water on your skin is colder than the surrounding air.
E)540 calories of heat are required to evaporate each gram of water from your skin,and most of this heat flows out of your body.

Question

Quizplus · Accepted Answer

When water evaporates from the surface of your skin, it requires heat energy to do so. This heat energy is taken from your body, causing you to feel colder. The process of evaporation has high latent heat of vaporization, which means it requires a large amount of heat to convert liquid water into water vapor. This heat is taken from your body, which makes you feel colder. Therefore, the correct choice is E.

You May Have Noticed That When You Get Out of a Swimming