Chapter 15, Problem 15.49CP

Interpretation Introduction

Interpretation:

Larger equilibrium constant should be identified.

Concept introduction:

Equilibrium is the condition at which the rate of formation of product is equal to the rate of disappearance of reactant.
The given reaction is:

  $\text{2 AB }\rightleftharpoons {\text{ A}}_{\text{2}}{\text{+ B}}_{\text{2}}$

The equilibrium constant of the forward direction is:

  ${\text{K}}_{\text{f}}=\left[{\text{A}}_{\text{2}}\right]\left[{\text{B}}_{\text{2}}\right]/{\left[\text{AB}\right]}^{\text{2}}$

The equilibrium constant for the reverse reaction is:

  ${\text{K}}_{\text{r}}={\left[\text{AB}\right]}^{\text{2}}/\left[{\text{A}}_{\text{2}}\right]\left[{\text{B}}_{\text{2}}\right]$