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Difference Between Boiling and Evaporating

Boiling vs Evaporating

Evaporation is the process by which the water surface absorbs heat. Boiling is the process by which the internal energy of the molecules of water is increased until it reaches the boiling point and it changes to a gaseous state after 100 degrees centigrade.

Evaporation happens at temperatures lower than the boiling point of liquids. When evaporation happens on the surface of the liquid, boiling happens inside the liquid. Moreover, the pressure of the surface atmosphere of the liquid has to be overcome for the formation of bubbles.

Evaporation is a slow process and cannot be seen. On the other hand, boiling happens rapidly, and the formation of bubbles and steam can be seen. Evaporation happens when the surface of water is exposed to the outside air. Once the surface is exposed, water molecules convert to vapor particles.

Boiling happens when the vapor pressure of liquid is equal to the outside pressure. Boiling has three different stages such as; transition boiling, nucleate boiling, and film boiling. On the contrary, evaporation does not have any stages.

In boiling, bubbles are formed as there are acoustic and cavitation effects in this process. But in the case of evaporation, no bubbles are formed as acoustic and cavitation effects do not happen.

There are also differences in the movement of molecules in boiling and evaporation. The movement of particles is increased in boiling, and this increased movement results in the separation of the particles. In evaporation, the movement of molecules is not the same. Some particles may move at a fast pace and some others more slowly.

Summary:

1.Evaporation is the process by which the water surface absorbs heat. Boiling is the process by which the internal energy of the molecules of water is increased until it reaches the boiling point.
2.Evaporation is a slow process and cannot be seen. On the other hand, boiling happens rapidly, and the formation of bubbles and steam can be seen.
3.Boiling has three different stages such as; transition boiling, nucleate boiling, and film boiling. On the contrary, evaporation does not have any stages.
4.When evaporation happens on the surface of the liquid, boiling happens inside the liquid.
5.In boiling, bubbles are formed as there are acoustic and cavitation effects in this process. But in the case of evaporation, no bubbles are formed as acoustic and cavitation effects do not happen.
6.The movement of particles is increased in boiling, and this increased movement results in the separation of the particles. In evaporation, some particles may move at a fast pace and some others more slowly.


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