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Give three differences between boiling and evaporation.

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Difference between boiling and evaporation

Sl.No.

Boiling

Evaporation

1.

It is a fast process

It is a slow process and takes a long time.

2.

It occurs at a fixed temperature known as boiling point. For ex: 100 ˚C for water.

It does not occur at fix temperature rather it may occur at any temperature above melting point.

3.

It involves the entire mass of the substance and needs heat energy to occur.

It involves surface of the substance only at normal energy obtained from the environment.

4.

It involves formation of bubbles.

No bubble is formed during evaporation.

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 BOILING:- It is bulk phenomena.

EVAPORATION: It is surface phenomena.

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 The differences between evaporation and boiling can be illustrated by the following points- 

1. Evaporation occurs on the surface of the liquid whereas boiling occurs at the entire mass of the liquid.
2. Boiling occurs rapidly whereas evaporation is a slow process.
3. Evaporation occurs at any temperature whereas boiling occurs at a specific temperature.
4. The motion of particles is fast in boiling whereas in evaporation few particles move slowly and few at a faster rate.
5. There is formation of bubbles in boiling, but bubbles are not seen in case of evaporation.

For example, Rainwater evaporates from warm pavement after a thunderstorm.

While bubbling water or bubbling gravy are examples of boiling.

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