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प्रश्न
Why is cooling produced when a liquid evaporates?
संक्षेप में उत्तर
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उत्तर
For changing liquid into vapours heat is needed this heat is taken from the container or surroundings and temperature of container or body itself fall and cooling is produced.
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Change of Liquid into Vapour State
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संबंधित प्रश्न
All molecules of a liquid take part in the process of evaporation.
Boiling is a rapid phenomenon.
Boiling occurs at ....................
Heat is ................... during boiling.
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 |
The rate of evaporation of a liquid increases when:
During boiling or vaporization
The boiling point of a liquid is increased by
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
Comment on the statement ‘evaporation is a surface phenomenon’.
