Chapter 6, Problem 6.78P

Interpretation Introduction

Interpretation:

The formula to calculate $\Delta H_{\text{rxn}}^{°}$ from $\Delta H_{\text{f}}^{°}$ values is to be determined.

Concept introduction:

The standard enthalpy of reaction $\left(\Delta H_{\text{rxn}}^{°}\right)$ is the enthalpy change associated with a reaction and the reactants and products associated with the reaction are at their standard state. On the other hand, the standard enthalpy of formation $\left(\Delta H_{\text{f}}^{°}\right)$ is the enthalpy change of the formation of $1\text{mol}$ of compound from its elements and the reactants and products, in this case, is also present in their standard state.