The empirical Freundlich adsorption isotherm is given as . When this equation is tested at exceedingly high pressures, experimental data deviates from the formula. According to experimental observatio

Question

The empirical Freundlich adsorption isotherm is given as $\frac{x}{m} = kp^{1/n}$. When this equation is tested at exceedingly high pressures, experimental data deviates from the formula. According to experimental observation, what should the theoretical value of $1/n$ mathematically approach at these high pressures to match reality?

Prashant Kotian · Accepted Answer

Correct answer: B. The Freundlich isotherm empirically models adsorption well at moderate pressures. However, experimentally, at very high pressures, the solid surface becomes completely saturated with adsorbate (forming a monolayer), meaning further pressure increases do not increase adsorption. Therefore, becomes a constant, which implies . Thus, mathematically approaches 0.

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