Question

Some facts related to adsorption are given below. Classify them into those suitable for Physisorption and Chemisorption.

1. Weak attractive force between adsorbent and adsorbate.

2. Strong attractive force between adsorbent and adsorbate.

3. Reversible process.

4. Irreversible process.

5. Multilayers are formed.

6. Monolayer is formed.

7. Heat of adsorption is 20-40 kJ/mol 

8. Heat of adsorption is 40-400 kJ/mol 

Answer 1

Physical adsorption	Chemical adsorption
1. Weak attractive force between adsorbent and adsorbate.	2. Strong attractive force between adsorbent and adsorbate.
3. Reversible process.	4. Irreversible process.
5. Multilayers are formed.	6. Monolayer is formed.
7. Heat of adsorption is 20-40 kJ/mol.	8. Heat of adsorption is 20-40 kJ/mol.