Chapter 12, Problem 79QRT

(a)

Interpretation Introduction

Interpretation:

The effect, which favors the forward reaction has to be given.

    ${\text{C}}_{\text{3}}{\text{H}}_{\text{8(g)}}\text{+}{\text{5O}}_{\text{2}}{}_{\text{(g)}}\underset{}{\rightleftharpoons }{\text{3CO}}_{\text{2(g)}}\text{+}{\text{4H}}_{\text{2}}{\text{O}}_{\text{(g)}}{\text{ΔH}}^{\text{o}}\text{=}\text{-2045}\text{kJ/mol}$

Concept Introduction:

Le Chatelier's principle:

It states that if a system in equilibrium gets disturbed due to modification of concentration, temperature, volume, and pressure, then it reset to counteract the effect of disturbance.

In the chemical reaction, negative value of enthalpy is means exothermic reaction and positive value mean endothermic reaction.

If number of mole increases result the increasing entropy value and decreases result the decreasing entropy of reaction.

(b)

Interpretation Introduction

Interpretation:

The effect, which favors the forward reaction has to be given.

    ${\text{Br}}_{\text{2(g)}}\underset{}{\rightleftharpoons }{\text{Br}}_{\text{2(l)}}{\text{ΔH}}^{\text{o}}\text{=-31}\text{kJ/mol}$

Concept Introduction:

Refer part (a)

(c)

Interpretation Introduction

Interpretation:

The effect, which favors the forward reaction, has to be given.

    ${\text{2Ag}}_{\text{(s)}}\text{+}{\text{3N}}_{\text{2}}{}_{\text{(g)}}\underset{}{\rightleftharpoons }{\text{2AgN}}_{\text{3(g)}}{\text{ΔH}}^{\text{o}}\text{=}\text{618}\text{kJ/mol}$

Concept Introduction:

Refer part (a)