5.5 What is an adsorption isotherm? Describe Freundlich adsorption isotherm.
The adsorption isotherm is a relation curve between the variation in the amount of gas adsorbed by the adsorbent with pressure at a constant temperature.
Fig:- Adsorption isotherm
Freundlich adsorption isotherm- Freundlich gave an empirical relationship between the quantity of gas adsorbed by a unit mass of solid (adsorbent) and pressure (at a particular temperature).
On taking log both sides-