Chapter 2.22, Problem 19P

Interpretation Introduction

Interpretation:

The change in enthalpy of the given reaction with the given standard enthalpies of formation of cyclopropane $(\Delta H_{\text{f}}^{\text{o}}=39.3\text{ kJ/mol})$ and cyclohexane $(\Delta H_{\text{f}}^{\text{o}}=-124.6\text{ kJ/mol})$, the $\Delta H°$ for the reaction is to be calculated.

Concept introduction:

Enthalpy change for a reaction is the difference in enthalpies of the products and reactants.

By arithmetic manipulation, the heats of formation of most organic compounds are calculated from the heats of reaction.