Charles's Law is a fundamental principle in chemistry that describes how gases behave when their temperature changes. It states that if the pressure of a gas remains constant, the volume of the gas will increase as the temperature rises. Conversely, if the temperature decreases, the volume will shrink. This relationship can be summarized by the formula V1/T1 = V2/T2, where V is volume and T is temperature in Kelvin. This law is named after Jacques Charles, a French scientist who discovered this relationship in the late 18th century. Understanding Charles's Law is essential in various fields, including meteorology and engineering, as it helps predict how gases will react under different temperature conditions.