Chapter 17, Problem 17.27P

(a)

Interpretation Introduction

Interpretation:

$\Delta \text{ng}$ for the reaction, $2{\text{KClO}}_{\text{3(s)}}\stackrel{}{\rightleftharpoons }{\text{ 2KCl}}_{\text{(s)}}{\text{ + 3O}}_{\text{2(g)}}$ has to be calculated.

Concept Introduction:

Relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$:

The relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$ is given by the following equation.

  ${\text{K}}_{\text{p}}{\text{ = K}}_{\text{c}}{\text{(RT)}}^{\Delta \text{ngas}}$

Where,

${\text{K}}_{\text{p}}$ is the equilibrium constant in terms of partial pressure

${\text{K}}_{\text{c}}$ is the equilibrium constant in terms of concentration

$\Delta \text{ngas = moles of gaseous product - moles of gaseous reactant}$

Only moles of gaseous products and reactants is used to calculate $\Delta \text{ngas}$

(b)

Interpretation Introduction

Interpretation:

$\Delta \text{ng}$ for the reaction, $2{\text{PbO}}_{\text{(s)}}{\text{+ O}}_{\text{2(g)}}\stackrel{}{\rightleftharpoons }{\text{ 2PbO}}_{\text{2}}{}_{\text{(s)}}$ has to be calculated.

Concept Introduction:

Relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$:

The relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$ is given by the following equation.

  ${\text{K}}_{\text{p}}{\text{ = K}}_{\text{c}}{\text{(RT)}}^{\Delta \text{ngas}}$

Where,

${\text{K}}_{\text{p}}$ is the equilibrium constant in terms of partial pressure

${\text{K}}_{\text{c}}$ is the equilibrium constant in terms of concentration

$\Delta \text{ngas = moles of gaseous product - moles of gaseous reactant}$

Only moles of gaseous products and reactants is used to calculate $\Delta \text{ngas}$

(c)

Interpretation Introduction

Interpretation:

$\Delta \text{ng}$ for the reaction, ${\text{I}}_{\text{2(s)}}{\text{ + 3XeF}}_{\text{2(s)}}\stackrel{}{\rightleftharpoons }{\text{ 2IF}}_3{}_{\text{(s)}}{\text{ + 3Xe}}_{\text{(g)}}$ has to be calculated.

Concept Introduction:

Relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$:

The relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$ is given by the following equation.

  ${\text{K}}_{\text{p}}{\text{ = K}}_{\text{c}}{\text{(RT)}}^{\Delta \text{ngas}}$

Where,

${\text{K}}_{\text{p}}$ is the equilibrium constant in terms of partial pressure

${\text{K}}_{\text{c}}$ is the equilibrium constant in terms of concentration

$\Delta \text{ngas = moles of gaseous product - moles of gaseous reactant}$

Only moles of gaseous products and reactants is used to calculate $\Delta \text{ngas}$