Difference Between Physisorption And Chemisorption.
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Physisorption Chemisorption
It is due to the formation of van der Waals forces. It is due to the formation of chemical bonds.
It is reversible in nature. It is irreversible in nature.
Physisorption is not specific in nature. It is very specific in nature.
It has low adsorption enthalpy nearly 20 to 40 kJ/mol. Chemisorption has high adsorption enthalpy nearly 80 to 240 kJ/mol.
It favours low temperature. It favours high temperature.
Physisorption decreases with increase in temperature. Chemisorption increases with increase in temperature.
It results in a multimolecular layer. It results in a unimolecular layer.
Activation energy is less in physisorption.
It is due to the formation of van der Waals forces. It is due to the formation of chemical bonds.
It is reversible in nature. It is irreversible in nature.
Physisorption is not specific in nature. It is very specific in nature.
It has low adsorption enthalpy nearly 20 to 40 kJ/mol. Chemisorption has high adsorption enthalpy nearly 80 to 240 kJ/mol.
It favours low temperature. It favours high temperature.
Physisorption decreases with increase in temperature. Chemisorption increases with increase in temperature.
It results in a multimolecular layer. It results in a unimolecular layer.
Activation energy is less in physisorption.
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Physisorption decreases with increase in temperature. Chemisorption increases with increase in temperature. It results in a multimolecular layer. It results in a unimolecular layer.
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