Chapter 15.6, Problem 15.11.2PE

Interpretation Introduction

Interpretation: The equilibrium pressures of ${\text{PCl}}_5$ , ${\text{PCl}}_{\text{3}}$ and ${\text{Cl}}_{\text{2}}$ at $500\text{ K}$ are to be calculated.

Concept introduction: The equilibrium constant is the ratio of equilibrium concentration or partial pressure of products to the reactants with each term raised to the power of their coefficient in the balanced chemical equation. For the general reaction,

$a\text{A}\left(g\right)+b\text{B}\left(g\right)\stackrel{}{\rightleftharpoons }c\text{C}\left(g\right)+d\text{D}\left(g\right)$

The equilibrium is given as,

$K_p=\frac{{\left(P_{\text{C}}\right)}^c{\left(P_{\text{D}}\right)}^d}{{\left(P_{\text{A}}\right)}^a{\left(P_{\text{B}}\right)}^b}$