What relationship describes Charles' Law?

Charles' Law states that the volume of a gas is directly proportional to its temperature when pressure is held constant. This means that when the temperature of a gas increases, its volume also increases, provided the pressure remains unchanged. Conversely, if the temperature decreases, the volume will decrease as well. This relationship can be expressed mathematically as V/T = k, where V is the volume, T is the temperature in Kelvin, and k is a constant.

This principle is fundamental in understanding the behavior of gases under varying temperature conditions. For example, when heating a balloon, the air inside expands, causing the balloon to increase in size. This illustrates the direct relationship between volume and temperature, highlighting the practical applications of Charles' Law in everyday phenomena and scientific contexts.