In Freundlich Adsorption isotherm, the value of $1/n$ is:

The Freundlich Adsorption Isotherm is given by:
$$\frac{x}{m}=k{p}^{1/n}$$
The value of $1/n$ is the power to which the pressure is raised. Experimentally, it is found that $1/n$ typically ranges from 0 to 1.When $1/n=0$, $\frac{x}{m}=\text{constant}$, meaning adsorption is independent of pressure.When $1/n=1$, $\frac{x}{m}=kp$, meaning adsorption varies linearly with pressure.Shutterstock