Question

Give 10 examples to shown that cooling is caused by evaporation

Answer 1

1. we Sprinkle water on the roof or open ground in summer. the water evaporates by taking the latent heat of vaporization from the ground and surrounding air . This keeps the ground cool.
2. During hot summer days water is usually kept in an earthen pot to keep it cool.
3. pouring of acetone on palm.
4. we wear cotton clothes in summer to keep cool and comfortable.
5. perspiration keeps are our body cold.
6. we see water droplets on the outer surface of a glass tumbler containing ice -cold water.
7. surgeons often spray some ether on skin before performing minor surgery.
8. Ice is rubbed on a burnt part of the skin. the reason is that due to burning the temperature of the injured skin increases. when ice is rubbed the excess heat from the skin is it taken by large latent heat of fusion of water. thus, the temperature of injured skin decreases we feel less pain.

HOPE THIS HELPS.