Advertisements
Advertisements
Question
Why is cooling produced when a liquid evaporates?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Evaporation takes place only from the surface of liquid.
All molecules of a liquid take part in the process of evaporation.
All molecules of a liquid take part in boiling.
Boiling occurs 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
The rate of evaporation of a liquid increases when:
Give reason for the increase in rate of evaporation of a liquid when surface area of liquid is increased.
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
