What relationship does Charles' law describe?

Charles' Law describes the direct relationship between the temperature and volume of a gas when pressure is held constant. According to this law, as the temperature of a gas increases, its volume also increases, provided the pressure remains unchanged. This principle is based on the kinetic theory of gases, which states that as temperature rises, the kinetic energy of gas molecules increases, causing them to move more vigorously and thus occupy more space.

This relationship is mathematically expressed as V1/T1 = V2/T2, where V represents volume and T represents temperature in Kelvin. Understanding this law is crucial in various applications, such as in predicting how gases will behave under varying temperatures and in processes involving gas storage and transport at different temperatures.