Question

During the adsorption of Krypton on activated charcoal at low temperature

• A. $\Delta H < 0$ and $\Delta S < 0$
• B. $\Delta H > 0$ and $\Delta S < 0$
• C. $\Delta H > 0$ and $\Delta S > 0$
• D. $\Delta H < 0$ and $\Delta S > 0$

Answer 1

Answer: (A)

$\Delta H < 0$ and $\Delta S < 0$

Answer 2

During adsorption, heat is liberated hence $\Delta H$ is negative (less than zero) and entropy decreases.