Physical Adsorption or physisorption
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Physisorption, also called physical adsorption, is a process in which the electronic structure of the atom or molecule is barely perturbed upon adsorption.
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Physical adsorption (Physisorption):
(1) The adsorption involving weak van der Waals forces is called physical adsorption physisorption
(2) The heat released during physisorption is of the same order as that of condensation.
(3) The physisorption is weak in nature.
(4) The adsorbed gas forms several layer of molecules at high pressures.
(5) The extent of adsorption is large at low temperature.
(6) Physical adsorption is reversible.
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