Question

We feel relaxed under a fan when we are perspiring. Why ?

Answer 1

• We generally sweat or perspire in summers.
• A fan produces a feeling of comfort because our perspiration or sweating gets evaporated.
• Our body tries to cool ourselves by releasing sweat through the pores of our skin. And when we sit under the fan, the sweat of our body evaporates making our body cool.
• Evaporation is the process in which liquid changes to vapours below its boiling point.
• Evaporation is an endothermic process as it takes heat to change liquid to vapours and after evaporation makes the surface feel cool.