What is the critical temperature of ammonia (NH3)?

The critical temperature of a substance is the highest temperature at which it can exist as a liquid, regardless of the pressure applied. For ammonia (NH3), this critical temperature is 271.4 degrees Fahrenheit.

At temperatures above this point, ammonia cannot be condensed into a liquid, even if the pressure is increased. This property is vital in understanding how ammonia behaves under various conditions, particularly in applications involving high-pressure piping systems where precise temperature management is crucial.

Knowing the critical temperature is essential for engineers and technicians working with ammonia in refrigeration systems and other industrial processes, as it influences the design and operation of equipment to ensure safety and efficiency.