Question

Why do we feel cool when we perspire?

Answer 1

Dear student,
keep in mind that pespire means to sweat.

The answer of this question is that when we sweat the water droplets after some time become water vapour. Water vapour needs some energy to evaporate so it uses heat energy from our body.
Evaporation of sweat from the skin surface has a cooling effect due to the latent heat of evaporation of water. It absorbs the excess heat from our body and evaporates thus we feel cool.