Chapter 17, Problem 17.81P

Interpretation Introduction

Interpretation:

The total pressure at equilibrium has to be calculated if $\text{7}\text{.80 g}$ of ${\text{NH}}_{\text{2}}{\text{COONH}}_{\text{4}}$ is put into a $\text{0}\text{.500-L}$ evacuated container.

Given,

At ${\text{250}}^{\text{°}}{\text{C, K}}_{\text{c}}\text{=1}{\text{.58×10}}^{\text{-8}}$ for the following equilibrium:

  ${\text{NH}}_{\text{2}}{\text{COONH}}_{\text{4}}{}_{\text{(s)}}\rightleftharpoons {\text{2NH}}_{\text{3(g)}}{\text{+ CO}}_{\text{2(g)}}$

Concept Introduction:

Total pressure can be calculated by using Ideal gas equation.

Ideal gas equation:

  $\begin{array}{l}\text{PV = nRT}\\ \\ \text{where,}\text{P = pressure}\\ \\ \text{V = volume}\\ \\ \text{T = temperature}\\ \\ \text{R = universal gas constant}\\ \\ \text{n = number of moles}\end{array}$