Advertisements
Advertisements
प्रश्न
Do all the molecules of a liquid take part in evaporation? If not, explain your answer.
Advertisements
उत्तर
No, all the molecules of the liquid do not take part in evaporation only those molecules near the surface of the liquid which acquire sufficient Kinetic energy (Threshold velocity) escape as they overcome attractive forces of other molecules. Then other molecules come to the surface of the liquid and acquire more K.E. and escape the surface. This continues till all the liquid evaporates.
APPEARS IN
संबंधित प्रश्न
Evaporation is rapid on a wet day.
Boiling is a rapid phenomenon.
Evaporation takes place at ................. .
The molecules of liquid ............. heat from surroundings in evaporation.
The rate of evaporation of a liquid increases when:
During boiling or vaporization
Why is cooling produced when a liquid evaporates?
Give reason for the increase in rate of evaporation of a liquid when surface area of liquid is increased.
What is the change in average kinetic energy of molecules of a liquid during boiling at its boiling point?
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
