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प्रश्न
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
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उत्तर
Due to the weak intermolecular force of attraction, the molecules of a liquid move freely inside it. In the process, they collide with each other transferring energy between them. Molecules with higher kinetic energy reach the surface of the liquid. These molecules absorb some more heat from the surroundings to gain sufficient kinetic energy to overcome the force of attraction on them due to other molecules inside the liquid escaping from the surface into space. These escaping molecules form the vapour of the liquid. Thus, evaporation of the liquid happens even though no heat is supplied to it.
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संबंधित प्रश्न
All molecules of a liquid take part in the process of evaporation.
Temperature of a liquid rises during boiling or vaporization
All molecules of a liquid take part in boiling.
Evaporation takes place at ................. .
Heat is ................... during boiling.
The rate of evaporation of a liquid increases when:
Do all the molecules of a liquid take part in evaporation? If not, explain your answer.
What is boiling? Explain it on the basis of molecular motion?
What is the change in average kinetic energy of molecules of a liquid during boiling at its boiling point?
Name two ways of change of liquid state to the vapour state and distinguish them.
