5.10 What is the difference between physisorption and chemisorption?

<p><strong>5.2</strong></p><table><tbody><tr><td width="315"><p><strong>Physisorption</strong></p></td><td width="314"><p><strong>Chemisorption</strong></p></td></tr><tr><td width="315"><p><strong>1)&nbsp;</strong> It happens due to Van there Waals forces.</p><p><strong>2)&nbsp;</strong> It is reversible.</p><p><strong>3)&nbsp; </strong>It is not specific in nature.</p><p><strong>4)&nbsp;</strong> Low enthalpy of adsorption (20-40 KJ mol^-1)</p><p><strong>5)</strong>&nbsp; Low temperature is favourable. It decreases with increase in temperature.</p><p><strong>6)</strong>&nbsp; Very less activation energy is needed.</p><p><strong>7)</strong>&nbsp; It results in the multimolecular layer.</p></td><td width="314"><p><strong>1)&nbsp;</strong> It is caused by Chemical bond formation.</p><p><strong>2)&nbsp; </strong>It is irreversible.</p><p><strong>3)</strong>&nbsp; It is very specific in nature.</p><p><strong>4)&nbsp;</strong> High enthalpy of adsorption (80-240 KJ mol^-1)</p><p><strong>5)</strong>&nbsp; The high temperature is favourable. It Increases with an increase in temperature.</p><p><strong>6)</strong>&nbsp; High activation energy is needed.</p><p><strong>7)&nbsp;</strong> It results in the unimolecular layer.</p></td></tr></tbody></table>

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