Chapter 5, Problem 5.66QE

(a)

Interpretation Introduction

Interpretation:

Energy-level diagram for the given reaction has to be drawn. The reaction is shown below,

  $\text{Zn}\left(s\right)\text{ + 2 HCl}\left(aq\right)\underset{}{\overset{}{\to }}{\text{ ZnCl}}_{\text{2}}\left(aq\right){\text{ + H}}_{\text{2}}\left(aq\right);\Delta H=-152.4\text{ kJ}$

Concept Introduction:

Enthalpy$\left(H\right)$: It is the total amount of heat in a particular system.

$\text{ΔH}$ in a reaction is positive then it is an endothermic reaction whereas the value obtained for $\text{ΔH}$ is negative it is an exothermic reaction.

(b)

Interpretation Introduction

Interpretation:

Energy-level diagram for the given reaction has to be drawn. The reaction is shown below,

  ${\text{N}}_{\text{2}}\left(g\right)\text{ + 2}{\text{O}}_{\text{2}}\left(g\right)\underset{}{\overset{}{\to }}2{\text{NO}}_{\text{2}}\left(g\right);\Delta H=+66.36\text{ kJ}$

Concept Introduction:

Refer to (a).

(c)

Interpretation Introduction

Interpretation:

Energy-level diagram for the given reaction has to be drawn. The reaction is shown below,

  $\text{2}{\text{C}}_{\text{2}}{\text{H}}_{\text{6}}\text{ + 7}{\text{O}}_2\left(g\right)\underset{}{\overset{}{\to }}4C{O}_2\left(g\right)\text{ + 6}{H}_{2}O\left(l\right);\Delta H=-3120\text{ kJ}$

Concept Introduction:

Refer to (a).