Which of the following causes the refrigerant to change from a gas to a liquid?

The condenser coil is where the refrigerant changes from a gas to a liquid. This process happens during the refrigeration cycle. After the refrigerant absorbs heat in the evaporator coil and evaporates into a gas, it is then compressed by the compressor, which increases its pressure and temperature. The high-pressure gas is then routed to the condenser coil.

In the condenser, the refrigerant releases the heat it absorbed in the evaporator to the surrounding air or water, causing it to cool down. As it loses heat, the refrigerant undergoes a phase change and condenses back into a liquid. This is a critical step in the refrigeration cycle, as the liquid refrigerant is necessary for the cooling process to continue effectively when it returns to the evaporator.

Understanding this process is essential for anyone working in refrigeration and air conditioning mechanics, as it directly relates to how cooling systems operate efficiently and effectively.