Chapter 17, Problem 17.90P

Interpretation Introduction

Interpretation:

Phosgene readily forms from carbon monoxide and chlorine at elevated temperatures.

  ${\text{CO}}_{\text{(g)}}{\text{+ Cl}}_{\text{2(g)}}\rightleftharpoons {\text{COCl}}_{\text{2(g)}}$

If $\text{0}\text{.350 mol}$ of each reactant is placed in a $\text{0}\text{.500-L}$ flask at $\text{600 K}$.  The concentrations of all three substances at equilibrium has to be calculated (${\text{K}}_{\text{c}}\text{=4}\text{.95}$ at this temperature).

Concept Introduction:

Reaction quotient:

The ratio of concentration terms for a reaction is known as reaction quotient.  It is denoted by $Q$.  For a reversible reaction of ${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}{\text{ to NO}}_{\text{2}}$, the reaction quotient is represented as

  $\begin{array}{l}{\text{N}}_{\text{2}}{\text{O}}_{\text{4}\left(\text{g}\right)}\rightleftharpoons {\text{2NO}}_{\text{2(g)}}\\ \\ Q_{\text{c}}\text{ = }\frac{{\left({\text{NO}}_{\text{2}}\right)}^{\text{2}}}{\left({\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\right)}\end{array}$