Chapter 6, Problem 30E

Interpretation Introduction

Interpretation:Partial pressure of $\text{NO}$ is to be determined.

  $\text{2NO}\left(g\right)+{\text{Br}}_2\left(g\right)\rightleftharpoons 2\text{NOBr}\left(g\right)$

Concept introduction: The formula to evaluate molarity is given as follows:

  $M=\frac{n}{V}$

Where,

• $V$ represents volume.
• $M$ represents molarity.
• $n$ represents number of moles.

For the equilibrium as indicated below.

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

Law of mass action states that for such equilibrium that involves solutions and gases expression for $K_{\text{p}}$ is written as follows:

  $K_{\text{p}}=\frac{{\left[P_{\text{C}}\right]}^c{\left[P_{\text{D}}\right]}^d}{{\left[{\text{P}}_{\text{A}}\right]}^a{\left[{\text{P}}_{\text{B}}\right]}^b}$

Where,

• $\left[P_{\text{C}}\right]$ denotes partial pressure of C.
• $\left[\text{D}\right]$ denotes partial pressure of D.
• $\left[\text{A}\right]$ denotes partial pressure of A.
• $\left[\text{B}\right]$ denotes partial pressure of B.
• $K_{\text{p}}$ denotes equilibrium constant for gaseous equilibrium.
• $a$ , $b$ , $c$ and $d$ are stoichiometric coefficients.