Question

For a linear plot of log ($x/m$) versus $\log p$ in a Freundlich adsorption isotherm, which of the following statements is correct? ($k$ and $n$ are constants)

• A. $1/n$ appears as the intercept.
• B. Only $1/n$ appears as the slope.
• C. $log\left(1/n\right)$ appears as the intercept.
• D. Both $k$ and $1/n$ appear in the slope term.

Answer 1

Answer: (B)

Only $1/n$ appears as the slope.

For a linear plot of log ($x/m$) versus log p in a Freundlich adsorption isotherm, only $1/n$ appears as the slope.
Equation is :

$\frac{x}{m}=k{P}^{1/n}$

$log\frac{x}{m}=\frac{1}{n}logP+logk$

Slope $=\frac{1}{n}$

$Y-$ intercept $=logk$