give conditions of temperature which favour physical adsorption.
Answers
Answer:
An increase in pressure decreases the volume of gas and thus increases the adsorption of gas molecules. ... Since the adsorption process is exothermic, the physical adsorption occurs readily at low temperature and decreases with increasing temperature (Le-Chatelier's principle).
JAI SHRI RAM
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The temperature conditions that favor Physical adsorption : low temperature .
Explanation:
Adsorption
It is the phenomenon when concentration of substance is more on surface than in bulk .
It involves two components :
Adsorbate
Adsorbent
Adsorbate
The substance that gets adsorbed .
Adsorbent
The surface that adsorbs the adsorbate .
For example : Charcoal adsorb gases : Charcoal : adsorbent and gases : adsorbate .
This adsorption occurs to satisfy the residual forces of surfaces molecules .
The types of adsorption are :
Physical adsorption
Chemical adsorption
Physical adsorption
When adsorbate and adsorbent are held by weak vander wall forces .
Chemical adsorption
When adsorbent and adsorbate are held by chemical bonds that are strong enough .
In physical adsorption :There is no specificity as any gas that can be adsorbed onto the surface
It has been observed that highly liquifiable gases are physically adsorbed more strongly.
It is reversible in nature and is dependent on pressure as well as temperature.
An increase in pressure decreases the volume of gas and thus increases the adsorption of gas molecules.
This is an exothermic process therefore it occurs readily at low temperature and decreases with increasing temperature in accordance with Le-Chatelier’s principle.