Boiling and condensation are two different processes but boiling point of water and
condensation point of steam have same numerical value (100°C). How?
Answers
Answer:
It is true that boiling, evaporation and condensation are different processes.
Explanation:
The concept of Latent Heat can be understood by dividing it into parts : The Latent Heat of Condensation is the amount of Heat energy released by a particular substance to change from its gaseous to liquid state. The Latent Heat of Vaporization is the amount of heat energy absorbed by a particular substance to change from its liquid to gaseous state.
Scientifically Boiling point is the temperature at which a substance reaches the amount of energy sufficient for it to change its state from liquid to gas.
Boiling is the process in which a liquid reaches its boiling point and then converts to its gaseous state and there also occurs the absorption of heat in the form of Latent heat but this heat energy absorbed by the substance does not change or affect its temperature as it is used in the changing of the state of the atoms of that substance.
Condensation is the process in which a gas reaches its condensation point and then converts to its liquid state and there also occurs the release of heat energy in the form of Latent heat but this heat energy released by the substance does not change or affect its temperature as it is used in the changing of the state of the atoms of that substance.
Evaporation is the process in which a liquid changes to its gaseous form after it absorbs the amount of energy sufficient for it to change its state without actually reaching the boiling point.
A pure substance condenses at a temperature equal to its boiling point.
Therefore the boiling point of water and condensation point of steam are the same.
If water has impurities then the boiling point increases while the condensation point of steam remains constant at 100°C.