FREUNDLICH ADSORPTION

What will be the Freundlich's adsorption isotherm equation at high pressure?

If W is the amount of adsorbate adsorbed by unit mass of an adsorbent whose mass is x g and the initial pressure and eqilibrium pressure of the adsorbate are p_(1) and P_(2) respectively, Freundlich's adsorption isotherm can be written as