Question

Why physisorption decrease with the increase of temperature?

Answer 1

Physisorption is a physical process, where are molecules are bonded together by weak vander walls forces of attraction.

With increasing temperatures the vibrations of the molecules increases rapidly resulting in the breakage of the formed bonds.

Hence temperature increase decreases Physisorption.

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Ashi

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Answer 2

Physisorption  is a type of adsorption in which atoms or molecules are attracted by weak van der Waals forces or intermolecular forces. no chemical bond formed between adsorbate and adsorbent. As temperature increases kinetic energy of molecules or atoms increase, consequently weak van der waals force breaks easily and adsorption decrease.

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