Evaporation is the process by which a liquid changes into a gas or vapor at a temperature below its boiling point. It occurs when the molecules of a liquid gain enough energy to break their bonds and escape into the air as gas. This process takes place only at the surface of the liquid, which is why evaporation is considered a surface phenomenon.


Several factors affect the rate of evaporation, including:

• Temperature


• Humidity


• Air movement


• Surface area

Boiling is the process by which a liquid changes into a gas or vapor at its boiling point. It occurs when the molecules of a liquid gain enough energy to overcome the forces of attraction between them and escape into the air as gas. Unlike evaporation, boiling takes place throughout the entire volume of the liquid, not just at the surface. This is why boiling is considered a bulk phenomenon.


Several factors affect the boiling point of a liquid, including:

• Pressure


• Altitude


• Purity of the liquid


• Presence of solutes

There are several key differences between evaporation and boiling:

• Evaporation occurs at a temperature below the boiling point, whereas boiling occurs at the boiling point.


• Evaporation takes place only at the surface of the liquid, whereas boiling takes place throughout the entire volume of the liquid.


• Evaporation is a slow process, whereas boiling is a rapid process.


• Evaporation is a surface phenomenon, whereas boiling is a bulk phenomenon.

In summary, evaporation and boiling are both processes by which a liquid changes into a gas or vapor. However, they differ in terms of the temperature at which they occur, the location within the liquid at which they occur, and the speed at which they occur. Understanding the differences between these two processes is important in a variety of fields, including chemistry, physics, and engineering.

in the process of evaporation with the help of sunlight only the water present on the upper surface get evaporate in the form of water vapour. that's why it is a surface phenomenon. in boiling the water present is put on a gas then the whole water particles from bottom to top are evaporated irrespective to surface. that's why it is a bulk phenomenon.