When a sample of solid carbon dioxide, \(\text{CO}_2\text{(s)}\), is placed in an open container at \(25\text{ }^\circ\text{C}\), it vaporizes completely without leaving a residue. Similarly, when a sample of solid ammonium carbamate, \(\text{NH}_2\text{COONH}_4\text{(s)}\), is placed in an open container at \(25\text{ }^\circ\text{C}\), it also vaporizes completely without leaving a residue. Chemical analysis reveals that the vaporization of \(\text{NH}_2\text{COONH}_4\text{(s)}\) produces a gaseous mixture of ammonia, \(\text{NH}_3\text{(g)}\), and carbon dioxide, \(\text{CO}_2\text{(g)}\), according to the following equation:

\[ \text{NH}_2\text{COONH}_4\text{(s)} \rightarrow 2\text{ NH}_3\text{(g)} + \text{CO}_2\text{(g)} \]

Which of the following correctly classifies the vaporization of \(\text{NH}_2\text{COONH}_4\text{(s)}\) and provides the best justification at the particulate level?