Which of the following is not true?

Step-by-step solution

Adsorption is a spontaneous process where gas molecules accumulate on the surface of a solid. Since it is a spontaneous process, the Gibbs free energy change G must be negative. The relationship is given by G = H - T S . Adsorption involves the decrease in the randomness of gas molecules as they get trapped on the surface, which means the entropy change S is negative. For G to be negative, the enthalpy change H must also be negative, as adsorption is an exothermic process. According to Le Chatelier's principle, for