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Surface Chemistry
Question
Why does physisorption decrease with the increase of temperature?
Solution
Answer:
It is because physical adsorption involves weak forces of attraction between adsorbent and adsorbent molecules, generally of Vander Waal's type. These forces decrease rapidly with increase in temperature.
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Some More Questions From Surface Chemistry Chapter
Why are powdered substances more effective adsorbents than their crystalline forms?
In Haber's process, hydrogen is obtained by reacting methane with steam in presence of NiO as catalyst. The process is known as steam reforming. Why is it necessary to remove CO when ammonia is obtained by Haber’s process?
Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?
What is the role of desorption in the process of catalysis?
Why is it essential to wash the precipitate with water before estimating it quantitatively?
What is adsorption?
What do you mean by adsorbent and adsorbate?
What is desorption?
Define physical and chemical adsorption.
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