Question

Which one of the following characteristics is associated with adsorption?

• A. $\Delta$G is negative but $\Delta$H and $\Delta$S are positive
• B. $\Delta$G, $\Delta$H and $\Delta$S all the negative
• C. $\Delta$G and $\Delta$H are negative but $\Delta$S is positive
• D. $\Delta$G and $\Delta$S are negative but $\Delta$H is positive

Answer 1

The correct option is B $\Delta$G, $\Delta$H and $\Delta$S all the negative

In adsorption $\Delta$G < 0 (Feasible), $\Delta$H < 0 (exothermic) and $\Delta$S (decrease in entropy) sholud be negative.