Question

explain why dogs pant during summer days using the concept of evaporation?

Answer 1

Dogs pant during summer days in order to keep themselves cool despite the scorching heat.

Larger the surface area, greater is the amount of evaporation and cooler the area gets.

Dogs have tongues with large surface area. The water molecules present on the surface of the tongue get evaporated while panting. Thence, the area gets cooled.
Panting promotes cooling effect.
This is a simple process by which dogs try to keep themselves cool even during hot summer days. (Just like how the sweat of humans get evaporated).

Answer 2

Answer:

1. Dogs pant during hot summer days and get their body cooled. This cooling effect is due to evaporation. Evaporation is a surface phenomenon.

2 Temperature of a system falls during evaporation. During summer the temperature in the human body increases the temperature of the skin. As a result, the water in the sweat glands starts evaporating. Evaporation is a cooling process in which human body gets cooled.

3. Dogs don't have sweat glands. Their body is covered with hair. They have sweat glands only in their feet.

4. So by panting the water on the tongue evaporates resulting in the cooling of the dog's body