Differentiate between chemisorption and physisorption?

1.	Differentiate between chemisorption and physisorption?
Answer» Physisorption: (a)The forces operating are weak vander Waal’s forces (b)The heat of adsorption is low 20-40 KJ Mol^-1 (c) Does not require any activation energy (d) Forms multimoleculer layer Chemisorption: (a) Forces acting are similar to those of chemical bonds (b) The heat of adsorption is high 80-240 KJ Mol^-1 (c) Requires activation energy (d) Forms unimolecular layer

Answer»

Physisorption:

(a)The forces operating are weak vander Waal’s forces

(b)The heat of adsorption is low 20-40 KJ Mol^-1

(d) Forms multimoleculer layer

Chemisorption:

(a) Forces acting are similar to those of chemical bonds

(b) The heat of adsorption is high 80-240 KJ Mol^-1

(d) Forms unimolecular layer

Discussion