Chapter 5, Problem 5.89QE

When a 2.30-g sample of magnesium dissolves in dilute hydrochloric acid, 16.25 kJ of heat is released. Determine the enthalpy change for the thermochemical equation

$\begin{array}{l}\text{Mg}\left(\text{s}\right)+\text{ 2HCl}\left(\text{aq}\right)\to {\text{ MgCl}}_{\text{2}}\left(\text{aq}\right)+{\text{ H}}_{\text{2}}\left(\text{g}\right)\\ \text{}\text{}\text{}\text{}\text{}\text{}\text{}\text{}\text{}\text{}\Delta H=?\end{array}$