1. Chemisorption involves a high activation energy so it is also referred to as activated adsorption.
2. It is found in chemisorption that it first increases and then decreases with increase in temperature. When adsorption is plotted, the graph first increaes and then decreases with temperature.
3. The initial increase illustrates the requirement of activation of the surface for adsorption is due to fact that formation of activated complex requires certain energy. But later it decreacs at high temperature is due to desorption as the kinetic energy of the adsorbate increases (exothermic nature)
