Question

Difference between langmuir and freundlich adsorption isotherm

Answer 1

This isotherm takes into accounts of indirect adsorbate-adsorbate interactions on adsorption isotherms. Temkin noted experimentally

Freundlich gave an empirical expression representing the isothermal variation of Adsorption of a quantity of gas adsorbed by unit ...

Answer 2

There is a fundamental difference between both models. Langmuir's model was a theoretical construct, while the Freundlich isotherm is empirical. In the Langmuirmodel, it is assumed that at maximum coverage, there is only a monomolecular layer on the surface. This means that there is no stacking of adsorbed molecules.