In a condenser, what state does the refrigerant change from and to?

In a condenser, the refrigerant undergoes a critical phase change as it transitions from a high-pressure vapor to a high-pressure liquid. This process occurs during the heat exchange where the refrigerant releases heat to the surroundings, allowing it to condense into a liquid form while still being under high pressure.

This phase change is a key part of the refrigeration cycle, as it effectively removes heat from the refrigerant, which is essential for cooling the area served by the system. The high-pressure vapor enters the condenser, and as it comes into contact with the cooling medium (like air or water), the latent heat is expelled. The refrigerant then condenses into a high-pressure liquid, which is vital for the next stage of the cycle in the expansion device. This configuration ensures the system operates efficiently and effectively in maintaining the desired temperature.

Other options describe incorrect phase transitions that do not accurately represent what occurs within a condenser.