Question

During the adsorption of a gas on the surface of a solid,
which of the following is true ?
(A) AG <0, AH > 0, AS < 0
(B) AG > 0, AH <0, AS < 0
(C) AG <0, AH <0, AS < 0
(D) AG <0, AH <0, AS > 0​

Answer 1

Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. Similar to surface tension, adsorption is a consequence of surface energy.