Q. Which of the following statements is correct for the spontaneous adsorption of a gas?
A) ΔS is negative and, therefore, ΔH should be highly positive.
B) ΔS is negative and therefore, ΔH should be highly negative.
C) ΔS is positive and therefore, ΔH should be negative.
D) ΔS is positive and, therefore, ΔH should also be highly positive.
Explanation
[Solution] Adsorption decreases randomness (ΔS < 0), so for ΔG < 0 it must be strongly exothermic. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.