Question

distinguish between evaporation and boiling. why does evaporation cause cooling?

Answer 1

Dear Student ,
1. Evaporation occurs on the surface of the liquid whereas boiling occurs at the entire length of liquid.
2. Boiling occurs rapidly whereas evaporation occurs slowly.
3. Evaporation occurs at any temperature whereas boiling occurs at a specific temperature.
4. The motion of particles is fast in boiling whereas in evaporation few particles move slowly and few at a faster rate.
5. There is formation of bubbles in boiling, but bubbles are not seen in evaporation.

Evaporation occurs when the particles of the liquid, absorb heat from the surrounding. The absorption of heat increases, the energy of the particles of the liquid, and they escape the liquid surface into gaseous form. Since, particle of liquid absorb heat from the surrounding, the amount of heat present in the surrounding decreases, which causes cooling in the surrounding.
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