Question

Explain the following:

How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?

Answer 1

The bottle taken out from the refrigerator has a lower temperature than the temperature of the surrounding environment, i.e., outside air in the atmosphere. It cools the air surrounding it. Air in the vicinity becomes saturated with vapour and the excess vapour condenses on the surface of the bottle in the form of water droplets. This phenomenon takes place due to air reaching its dew point temperature.