Chapter 6, Problem 6.59P

(a)

Interpretation Introduction

Interpretation:

A balanced thermochemical equation for the formation of $1\text{ mol}$ of $\text{NO}$ from its elements is to be determined.

Concept introduction:

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of the product. $H_{\text{Product}}$ is greater than $H_{\text{Reactant}}$ in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. $H_{\text{Reactant}}$ is greater than $H_{\text{Product}}$ in the exothermic reactions.

The balanced thermochemical equation is the type of chemical equation that also mentions the heat of the reaction. The general balanced thermochemical equation is as follows:

$\text{A}+\text{B}\to \text{C}$                                       $\Delta H_{\text{rxn}}=x$

Here, $x$ is the enthalpy of the reaction.

(b)

Interpretation Introduction

Interpretation:

$\Delta H$ when $3.50\text{ g}$ of $\text{NO}$ decomposes is to be determined.

Concept introduction:

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of the product. $H_{\text{Product}}$ is greater than $H_{\text{Reactant}}$ in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. $H_{\text{Reactant}}$ is greater than $H_{\text{Product}}$ in the exothermic reactions.