Question

Why does water stay cool when kept in an earthen pot??​

Answer 1

Hey! mate, GOOD EVENING☺

Earthen pot has many pores through which water comes out when this water starts evaporating it makes the earthen pot cool and water comes in contact with the earthen pot also cools.

HOPE IT HELPS YOU❤❤❤❤

Answer 2

Evaporative cooling works by removing the high-velocity tail of the kinetic energy distribution. That is, only the fastest molecules escape the liquid, leaving the rest to thermalize at a lower temperature. If there is capillary action taking water to the outside of the pot and that is evaporating, then the pot cools down as it is losing heat to the leaving molecules' kinetic energy. This then cools down the water inside by conduction.

One can then ask why, if the air is hotter than the water, can heat flow from the water intothe hot air? The answer to this is that there is also a reverse process which is also possible: on a wet day, water molecules in the air can rejoin the water on the pot walls, and if the air is hot then in the mean this process will heat the pot and the water