In Freundlich adsorption isotherm, the value of 1 / n & is

Freundlich isotherm is related with the pressure of gas adsorbed, as follows $\dfrac{x}{m} = k \cdot p^{1 / n}$

where, $\dfrac{x}{m} =$ amount of gas~\left(x\right)$adsorbed over the surface of mass \left(m\right)$.

$p =$ pressure of gas

$k =$ freundlich constant

Thus, value of $' n '$ is always greater than 1 and therefore value of $1 / n$ lies between $0 and 1$.