Chapter 19, Problem 19B.11P

Interpretation Introduction

Interpretation:

For the given data, the isotherm that best fits has to be chosen.

Concept Introduction:

Langmuir isotherm:

The Langmuir isotherm, which relates the surface coverage to the pressure, and in which the parameter alpha has the dimensions of 1/pressure:

    $\text{θ}\text{=}\frac{\text{KP}}{\text{1}\text{+}\text{KP}}$ 

Freundlich isotherm:

  $\text{θ}\text{=}{\text{C}}_{\text{1}}{\text{P}}^{{\text{1/c}}_{\text{2}}}$

This isotherm attempts to incorporate the role of interactions between the adsorbed

molecules on the surface.

Temkin isotherm:

    ${\text{θ= c}}_{\text{1}}{\text{ ln(c}}_{\text{2}}\text{, p)}$

where ${\text{c}}_{\text{1}}{\text{, and c}}_{\text{2}}$ are constants, corresponds to supposing that the adsorption enthalpy changes linearly with pressure.