Question

Explain with the examples from your daily life where cooling is caused by evaporation.

CBSE Class IX Science SA 2 (3 Marks)

Answer 1

Evaporative cooling happens when a liquid evaporates and the one that stays behind has a cooling effect.

This process occurs when hot molecules possessing immense amount of kinetic energy change into gaseous state.

Examples:

Evaporation of water from mud pots,

Acetone present in nail paint remover absorbs heat from our body and evaporates,

Evaporating of sweat keeps body cool

Answer 2

Answer:

Explanation:Best example is,when we play in summer our body starts sweating and when this sweat evaporates from our body surface it keeps our body temperature constant and make us feel cool.