An adsorption isobar represents the variation in the amount of gas adsorbed () with absolute tempera — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Chemisorption involves chemical bond formation and therefore behaves like a chemical reaction that requires an activation energy. Thus, adsorption initially increases with temperature as activation energy is supplied. At higher temperatures, the thermal energy overcomes the chemical bond strength, increasing the rate of desorption and causing the overall adsorption to decrease, resulting in a bell-shaped curve.