Chapter 5, Problem 5I.9E

(a)

Interpretation Introduction

Interpretation:

The reaction quotient for the given reaction has to be calculated.

  $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right),K=160$

Concept Introduction:

Consider a gaseous reaction of the form as given below.

  $aA\left(g\right)+bB\left(g\right)\to cC\left(g\right)+dD\left(g\right)$

The expression of the reaction quotient can be written as given below.

  $Q=\frac{{\left(P_C\right)}^c{\left(P_D\right)}^d}{{\left(P_A\right)}^a{\left(P_B\right)}^b}$

Where, $P_C$ and $P_D$ are partial pressure of product C and D and $P_A$ and $P_B$ are partial pressures of reactant A and B.

(b)

Interpretation Introduction

Interpretation:

The reaction is at equilibrium or not has to be determined.

Concept Introduction:

Direction of a reaction:

• If Q < K, the reaction has tendency to proceed toward products.
• If Q = K, the reaction has achieved the equilibrium position.
• If Q > K, the reaction has tendency to proceed toward reactants.

Where, Q is reaction quotient.

(c)

Interpretation Introduction

Interpretation:

The reaction will have a tendency to form more reactants or more products has to be determined.

Concept Introduction:

Refer to part (b).