What process is exemplified by liquid ammonia transitioning to vapor?

The process exemplified by liquid ammonia transitioning to vapor is best described as latent heat transfer. This phenomenon occurs when a substance changes from one state of matter to another—such as from liquid to vapor or vice versa—without changing its temperature.

When liquid ammonia is heated, it absorbs heat energy, which breaks the intermolecular forces holding the liquid molecules together, allowing them to escape into the gaseous phase. This process does not result in a temperature increase until the complete phase change occurs, which emphasizes the concept of latent heat transfer. In this instance, all the heat energy is used to change the state of the ammonia rather than increasing its temperature, demonstrating how latent heat is crucial in refrigeration and other thermodynamic processes.

While the other options pertain to relevant concepts in thermodynamics, they do not accurately describe what is happening in this specific scenario of ammonia transitioning to vapor. Condensation refers to the transition from gas to liquid, while evaporation typically implies a gradual process of change over time rather than a continuous state transition under certain conditions. Boiling involves the formation of bubbles within a liquid as it heats, which may not fully encompass the transition occurring in the question.