Surface Chemistry
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New answer posted
8 months agoContributor-Level 10
5.2
As Physisorption is Exothermic in nature, which means when gas gets adsorbed on the solid surface, Heat is evolved. So, according to Le-Chatelieres when the temperature is an increased reverse process (Desorption) will be favoured. So, Physisorption decreases with the increase of temperature.
Where x/m: Volume of gas adsorbed
T: Temperature.
New answer posted
8 months agoContributor-Level 10
5.1
The two characteristics of Chemisorption are:
1. In Chemisorption which is highly specific in nature, the adsorb ate and adsorbent get attached by chemical bonds which are either covalent or ionic in
2. High activation energy is required and high temperature is also
3. Chemisorption increases with the increase in surface area which results in more number of active
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