05:10
Chemistry A Molecular Approach
When ammonium chloride $\left(\mathrm{NH}_{4} \mathrm{Cl}\right)$ is dissolved in water, the
solution becomes colder.
$$\begin{array}{l}{\text { a. Is the dissolution of ammonium chloride endothermic or }} \\ {\text { exothermic? }} \\ {\text { b. What can you conclude about the relative magnitudes }} \\ {\text { of the lattice energy of ammonium chloride and its heat of }} \\ {\text { hydration? }} \\ {\text { c. Sketch a qualitative energy diagram similar to Figure } 13.7 \text { for }} \\ {\text { d. Why does the solution form? What drives the process? }}\end{array}$$