Which process involves refrigerant changing from vapor to liquid?

The process where refrigerant changes from vapor to liquid is known as condensation. In this process, the refrigerant, which is in a gaseous state, releases heat and transforms into a liquid state. This typically occurs within a condenser, where the refrigerant passes over a coil that is cooled by either air or water. As the refrigerant loses heat, its temperature decreases, and it condenses into a liquid, allowing the heat absorbed during the evaporation phase to be expelled from the system.

Understanding condensation is crucial in refrigeration and air conditioning systems, as it plays a critical role in the thermodynamic cycle, facilitating the continual use of the refrigerant to absorb heat from indoor environments and release it outside.