Chapter 9, Problem 71E

Interpretation Introduction

Interpretation:

The Lewis structure for each of the species in the given steps is to be drawn. The enthalpy of reaction using bond energies is to be estimated.

Concept introduction: Lewis structures, also known as Lewis dot structures, are the diagrams that show bonding between various atoms of a molecule. The valence electrons around an atom are shown by dots. Bonds between atoms are shown by lines and the lone pair of electrons is shown by a pair of dots. The enthalpy of a reaction is the change in enthalpy of a system when reactants change into products. It is denoted by $\text{Δ}{H}_{\text{rxn}}$ . According to Hess’ law of constant heat summation, the total enthalpy change of a reaction will be equal to the sum of enthalpy changes of all the steps involved in the reaction.

${\text{ΔH}}_{\text{rxn}}$ is calculated by the formula,

${\text{ΔH}}_{\text{rxn}}={\displaystyle \sum \left({\text{ΔH}}_{\text{bonds}\text{broken}}\right)}+{\displaystyle \sum \left({\text{ΔH}}_{\text{bonds}\text{formed}}\right)}$

To determine: The Lewis structure for each of the species in the given steps. Also determine the enthalpy of reaction using bond energies.