Question

describe the effect of temperature on phyisorption and chemisorption. need the answer very urgently

Answer 1

* Effect of temperature: Since physical adsorption is an exothermic process, it occurs more readily at lower temperatures and decreases with increase in temperature ( Le-Chatelier's Principle).

* Effect of temperature: Even though chemical adsorption is an exothermic process, it does not occurs slowly at lower temperature due to high kinetic energy barrier. Hence, like most chemical changes, the extent of chemisorption increases with increase in temperature up to certain limit and then after that it starts decreasing.

Answer 2

phyisorption occurs more readily at lower temperatures , decreases with increase in temperature by the principle of Le-Chatelier's .

chemisorption increases with increase in temperature up to certain limit and then after that it starts decreasing.