In an air conditioning system, the liquid that changes to gas as it absorbs heat is known as?

In an air conditioning system, the liquid that changes to gas as it absorbs heat is referred to as refrigerant. This substance plays a crucial role in the heat exchange process, facilitating the movement of heat from the indoor environment to the outside, thereby cooling the interior of a building or space. When the refrigerant absorbs heat from the air inside the building, it transitions from a liquid state to a gaseous state, allowing it to carry that heat away.

Refrigerants are specifically designed to undergo phase changes at relatively low temperatures and pressures, making them effective for cooling applications. They operate through a cycle of condensation and evaporation, making it possible to achieve temperature control in HVAC systems.

In this context, condensate refers to the liquid that forms when vaporized refrigerant cools and condenses, whereas coolant is a broader term that could apply to any fluid used to transfer heat, not specifically the phase-changing fluid in air conditioning. Fluidizer is not a standard term used in this context, particularly concerning air conditioning systems. Thus, the term refrigerant is the most accurate in describing the liquid that absorbs heat and changes to gas within an air conditioning system.