Question

Give reasons for the following.

Evaporation can be desirable or undesirable.

Answer 1

Evaporation:

• Evaporation is the change of a liquid into a vapor at a temperature below the boiling point.
• It is slow and reversible change.

Evaporation as a desirable change:

• When evaporation is beneficial for human and environment, It can be called as desirable change.
• For example, preparation of salt from seawater, drying of clothes

Evaporation as an undesirable change:

• When evaporation is not beneficial for human and environment, It is called as desirable change because we do not want such events to occur.
• For example, drying up of lakes in summer, high humidity

Thus, evaporation can be a desirable or undesirable change.