How will you differentiate between evaporation and boiling ? Illustrate with suitable examples.

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Solution

Evaporation Boiling
Evaporation takes place at all temperatures. Boiling happens only at the boiling point of the liquid.
It is a slow process. It is a fast process.
It occurs on the surface of the liquid. It usually occurs on the entire mass of the liquid.
During evaporation, the temperature may change. During boiling, temperature remains constant.
It always causes cooling No cooling during boiling.
It is affected by factors like surface area, wind speed, humidity, and temperature. The boiling of a liquid does not depend upon the surface area, wind speed, humidity, and temperature.
For example, sweat from our bodies gets evaporated and makes our body cool, water kept under the sun will evaporate slowly but does not boil off. For example, water boils at 100 °C.

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