Question

Write three distinct features of chemisorption which are not found in physisorption

Answer 1

chemisorption is formed chemical bond
chemisorption is not formed multilayer
chemisorption is applied low pressure
reverse of physisorption..

Answer 2

Three distinct features of chemisorption and physisorption.

Chemisorption:

• The type of adsorption in which atoms are attached to the solid surface with chemical bond, it is called chemisorption.
• Its distinct features are as follows:

1. The nature of the reaction is highly specific and occurs during high temperature.
2. The enthalpy value of this adsorption is high and ranges from 80-240 kLmo$l^{-1}$.
3. It forms a single layer on the adsorbed surface.

Physisorption:

• The type of adsorption in which atoms are attached to the solid surface with weak Vander Waal's force, it is called chemisorption.
• Its distinct features are as follows:

1. The nature of the reaction is less specific and occurs during low temperature.
2. The enthalpy value of this adsorption is less and ranges from 20-40 kLmo$l^{-1}$.
3. It forms many layers on the adsorbed surface.

Learn more about adsorption

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