Ammonia under 33 PSIG boils at what temperature?

Ammonia, when subjected to a pressure of 33 PSIG, has a boiling point of approximately 20ºF. This is due to the properties of ammonia as a refrigerant. The boiling point of a substance varies with pressure, and for ammonia, lowering the pressure results in a decreased boiling point. At 33 PSIG, which equates to a specific vapor pressure above atmospheric conditions, ammonia transitions from a liquid to a gas at this temperature.

Understanding the boiling point is crucial in refrigeration and HVAC applications where ammonia is commonly used. It allows operators to design systems effectively, accounting for operating conditions and temperatures. Knowing that ammonia's properties may change based on pressure helps in making safer and more efficient operational decisions.