What is the difference between physisorption and chemisorption?
Answers
The difference between the physisorption and chemisorptions is following- In case of physisorption, the adsorbate gets attached to surface of adsorbent by weak Van der waal’s force.
New compounds are not formed in the physisorption.
In case of chemisorptions, a strong chemical bond is observed.
New compounds are formed in the process.
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PHYSISORPTION :-
➡ It arises because of van der waal's forces.
➡It is not specific in nature.
➡It is reversible in nature.
➡It depends on the nature of gas easily liquefiable gases are adsorbed readily.
➡Enthalpy of adsorption is low (20-40 KJ mol-1).
CHEMISORPTION :-
➡It is caused by chemical bond formation.
➡It is highly specific in nature.
➡It is irreversible.
➡It also depends on the nature of gas gases which can react with the adsorbent show chemisorption.
➡Enthalpy of adsorption is high (80-240 KJ mol-1).