What term describes the refrigerant’s ability to change from liquid to vapour in the evaporator?

The term that describes the refrigerant’s ability to change from liquid to vapor in the evaporator is evaporation. In the context of refrigeration cycles, the evaporator is where low-pressure liquid refrigerant absorbs heat from its surroundings, causing it to transition into a vapor. This phase change occurs at relatively low temperatures and pressures, allowing the refrigerant to collect heat from the area being cooled, effectively removing heat and providing the desired cooling effect.

Evaporation specifically refers to the process in which a liquid transforms into a vapor, which is exactly what occurs in the evaporator of a refrigeration system. Being able to recognize the specific phases of a refrigerant's cycle, such as when it evaporates in the evaporator, is crucial for understanding how refrigeration systems operate efficiently.