Question

State four points of differences between evaporation and boiling?

Answer 1

Both evaporation and boiling are a kind of thermodynamic process which involves exchange of heat energy between the system and the surrounding. Both of these processes are very common and are a part of our everyday life.

Complete step by step solution:

Evaporation	Boiling
1-Evaporation is the process of conversion of water that is liquid state into its vapors that is into gaseous state. This is a natural process and it occurs very slowly	1-Boiling is also conversion of water the liquid state into its vapors the gaseous state but it the unnatural process and it occurs very rapidly
2-Evaporation occurs by virtue of increase in temperature or change in pressure and it always occurs at the topmost layer of liquid.	2- boiling occurs on account of heating when heat is supplied continuously from outside and it occurs through the medium and water molecules after being heated up rises from bottom to the top.
3- Since evaporation is a slow process there is not any visible sign in the medium where evaporation is being taking place	3- Since boiling is a very fast process one visible distinguished sign is the bubbling effect at the top most layer in the water where boiling is taking place.
4-Evaporation can also occur on account of internal heating or say on virtue of internal energy of the water.	4- Boiling can never take place on its own and it requires continuous supply of heat from an external source.

Note: Evaporation is a natural process and so it can take place at any temperature but boiling requires a certain minimum temperature to hold for it to happen.