Chapter 5, Problem 70QP

Interpretation Introduction

Interpretation:

The standard enthalpy change of the formation of atomic hydrogen is to be determined.

Concept introduction:

Enthalpy change is the amount of heat either absorbed or released when a reaction takes place.

Equation for calculating the enthalpy of a reaction is as follows:

$\Delta H_{\text{rxn}}^{\circ }={\displaystyle \sum n}\Delta H_{\text{f}}^{\circ }\left(\text{products}\right)-{\displaystyle \sum n}\Delta H_{\text{f}}^{\circ }\left(\text{reactants}\right)$

Here, $\Delta H_{\text{f}}^{\circ }\left(\text{products}\right)$ is the enthalpy change of products and $\Delta H_{\text{f}}^{\circ }\left(\text{reactants}\right)$ is the enthalpy change of reactants.