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What is different between physical adsorption …

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What is different between physical adsorption and chemical adoption?

    • Posted by Sakshi Yadav 4 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 4 years, 10 months ago

    Physical adsorption Chemical adsorption
     Weak van der Waals forces are present between adsorbate and adsorbent. Strong chemical (covalent) bonds are formed between  adsorbate and adsorbent.
     It has low heat of adsorption (20 to 40 kJ/mol).  It has high heat of adsorption (40 to 200 kJ/mol).
     Multilayers of adsorbed particles are formed. Monolayer of adsorbed particles  is formed.
     It is not specific in nature.   It is specific in nature.

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