This episode explains three additional gas laws including the unifying Combined Gas Law. It first introduces Gay-Lussac's Law, which states that pressure is directly proportional to absolute temperature at constant volume. Next, it covers Avogadro's Law, which describes the direct relationship between a gas's volume and the number of moles. The episode then introduces the Combined Gas Law, a powerful tool for solving problems where multiple variables change simultaneously. It concludes by highlighting the importance of using Kelvin for all temperature calculations and providing a systematic approach for solving complex gas law problems.