Which of the following thermodynamic changes accurately describe the adsorption of nitrogen gas on f — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Adsorption is universally an exothermic process ($\Delta H < 0$), making A correct. The entropy actually decreases because nitrogen gas loses its freedom of movement upon hitting the surface, so B is incorrect. The driving force is the neutralization of residual surface forces (decrease in surface energy), making C correct. At equilibrium, $\Delta G = 0$, leading to $\Delta H = T\Delta S$, making D correct.