First slide
Adsorption
Question

Which one of the following characteristics is associated with adsorption?

Easy
Solution

As the molecules of the adsorbate are held on the surface of the solid adsorbent, entropy decreases i.e.,S=-ve. As ΔG=ΔH-TΔS
For the adsorption to occur,

 G=-ve and it is possible only if H=-ve

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