Solid ammonium chloride is heated. Ammonia and hydrogen chloride gases are produced. This is reaction 1. Ammonia gas is combined with hydrogen chloride gas. Solid ammonium chloride is produced. This is reaction 2. Which statement is correct?
- ABoth reaction 1 and reaction 2 are exothermic.
- BReaction 2 is reversible.
- CThe equation for reaction 1 is $\text{NH}_4\text{Cl} \rightarrow \text{NH}_4 + \text{HCl}$.
- DThe three substances involved in each reaction all have a simple molecular structure.