First slide
Adsorption
Question

Which of the following statements is correct for the spontaneous adsorption of a gas?

Moderate
Solution

Using Gibb's - Helmholtz equation, 

G = H - TS

During adsorption of gas, entropy decreases i.e., S<0

For spontaneous adsorption, Gshould be negative, which is possible when H is highly negative. 

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