Question

write four main differences in physical adsorption and chemisorption​

Answer 1

Answer:

Physical adsorption:

1. Weak van der Waals forces are present between adsorbate and adsorbent.

2. It has low heat of adsorption (20 to 40 kJ/mol).

3. Multilayers of adsorbed particles are formed.

4. It is not specific in nature.

Chemical adsorption:

1. Strong chemical (covalent) bonds are formed between adsorbate and adsorbent.

2. It has high heat of adsorption (40 to 200 kJ/mol).

3. Monolayer of adsorbed particles is formed.

4. It is specific in nature.

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