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Question
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
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Solution
During boiling the heat energy supplied is used in increasing the energy of water molecule and hence the change of phase takes place. On recieving sufficient amount of energy it get converted into the gaseous state.
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RELATED QUESTIONS
All molecules of a liquid take part in the process of evaporation.
All molecules of a liquid take part in boiling.
Heat is ................... during boiling.
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:
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 air is blown above the liquid.
