Chapter 9, Problem 80E

Interpretation Introduction

Interpretation:

The option corresponding to the true statement of an endothermic reaction is to be identified.

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.

${\text{ΔH}}_{\text{rxn}}$ 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 option corresponding to the true statement of an endothermic reaction.

Correct answer: The correct option is (a).