Chapter 9, Problem 74E

Interpretation Introduction

Interpretation:

The standard enthalpy of formation of gaseous benzene using average bond energies and standard enthalpy of formation of $\text{C}$ is to be calculated.

Concept introduction: The enthalpy of a reaction is the change in enthalpy of a system when reactants change into products. It is denoted by $\text{Δ}{H}_{\text{rxn}}$

The enthalpy of formation is defined as the enthalpy change that occurs when the formation of one mole of a substance takes place from its elements in their most stable states of aggregation.
The ${\text{ΔH}}_{\text{rxn}}$ is calculated by the formula,

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

To determine: The standard enthalpy of formation of gaseous benzene using average bond energies and standard enthalpy of formation of $\text{C}$