What is the boiling point of ammonia (Nh3)?

The boiling point of ammonia (NH3) at standard atmospheric pressure is indeed -28°F. This low boiling point is characteristic of ammonia, which is a colorless gas at room temperature and pressure. When it is cooled below this temperature, it transitions from a gaseous state to a liquid.

Ammonia's boiling point is a result of its molecular structure and the strength of the intermolecular forces present, specifically hydrogen bonding between ammonia molecules. This causes ammonia to have a significantly lower boiling point compared to many common substances.

Understanding the boiling point of ammonia is crucial for refrigeration engineers, as ammonia is widely used as a refrigerant in industrial refrigeration systems. Knowledge of its properties, including boiling point, allows engineers to design and operate systems safely and efficiently.