Air Conditioning Repair Certification (ETI) Practice Exam 2026 - Free Air Conditioning Repair Practice Questions and Study Guide

The term for the process where refrigerant transitions from a liquid to a gas is vaporization. During this process, the refrigerant absorbs heat from its surroundings, which allows it to overcome the intermolecular forces keeping the liquid together. As the liquid refrigerant gains enough energy, it transforms into a gas, effectively removing heat from the evaporator coil and thereby cooling the air around it.

Understanding vaporization is crucial for grasping how air conditioning systems operate, as it is the key phase change that facilitates the absorption of heat within the system. This process is vital for the refrigeration cycle, as it helps maintain efficient cooling and temperature control in HVAC systems.