What specific events occur to a closed system undergoing gas adsorption as it approaches dynamic equ — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Initially, the rate of adsorption is high and desorption is near zero. As surface coverage increases, the rate of desorption rises while the rate of adsorption drops until they match (A is correct). The driving force $\Delta G$ becomes less and less negative until it hits zero at equilibrium (B is correct). $\Delta H$ decreases in magnitude (becomes less negative) as less energetic sites are filled, and the solid's surface area remains essentially constant.