Chapter 13, Problem 65APP

Interpretation Introduction

Interpretation:

Concentration of ${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}$ should be identified.

Concept introduction:

Equilibrium is the condition at which the rate of formation of product is equal to rate of disappearance of reactant.

Equilibrium constant is the concentration of product raise to its molecular coefficient divided to the concentration of reactant raise to its molecular coefficient, pure solids and liquids are not included in the equilibrium constant expression, can be shown as follows:

$\text{K}\text{=}\frac{\text{[P]}}{\text{[R]}}$

[P] is concentration of product

[R] is concentration of reactant

Given:

  ${\text{2NO}}_{\text{2}}\text{(g)}\rightleftarrows {\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\text{(g)}$

$\begin{array}{l}{\text{K}}_{\text{c}}\text{=}\text{5}{\text{at 100}}^{\text{o}}\text{C}\\ {\text{[NO}}_{\text{2}}\text{]}\text{=}\text{0}\text{.5}\text{M}\end{array}$