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प्रश्न
What is the change in average kinetic energy of molecules of a liquid during boiling at its boiling point?
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उत्तर
The Average kinetic energy of liquid molecules increases during boiling. After the boiling point is reached, the temperature remains constant at this point because all of the heat (latent heat) is now being utilised for work. The average kinetic energy of the molecules increases even though the temperature remains the same.
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संबंधित प्रश्न
Temperature of a liquid rises during boiling or vaporization
Boiling is a rapid phenomenon.
Evaporation takes place at ................. .
Cooling is produced in ....................
Match the column
| Column A | Column B |
| (a) Blowing air increases | (1) Increase in intermolecular separation |
| (b) Increase in pressure increases | (2) Pendulum of a clock |
| (c) Thermal expansion |
(3) Cooking utensils |
| (d) Invar | (4) Boiling point |
| (e) Pyrex glass | (5) Evaporation |
In evaporation
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
Why is cooling produced when a liquid evaporates?
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
