Question

What is the difference between physisorption and chemisorption?

Answer 1

In physisorption the adsorbate and adsorbent are attracted by weak Van der waals forces and hence it is reversible.

While in chemisorption, the adsorbate and adsorbent are attracted by strong chemical bonds hence it is mostly irreversible.

Note : Some adsorption first follows adsorption and after a certain time it follows chemisorption.

Answer 2

HEYA MATE HERE YOU GO ☺

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).

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