The key differences between physisorption and chemisorption lie in the nature and strength of the interactions:
1. Nature of Interaction: Physisorption involves van der Waals forces, while chemisorption involves the formation of chemical bonds. 2. Strength of Interaction: Physisorption is generally weaker, with adsorption energies ranging from 4 to 40 kJ/mol, whereas chemisorption energies are typically between 40 and 800 kJ/mol. 3. Reversibility: Physisorption is usually reversible due to the weak forces involved, whereas chemisorption is often irreversible. 4. Temperature Dependence: Physisorption is favored at lower temperatures, while chemisorption occurs more readily at higher temperatures.
