What relationship does Charles' Law describe between temperature and volume?

Charles' Law states that at constant pressure, the volume of a gas is directly proportional to its temperature when measured in Kelvin. This means that as the temperature of a gas increases, its volume also increases, provided that the pressure remains unchanged.

In this relationship, if the temperature rises, the gas molecules move more vigorously, causing them to occupy more space, thus increasing volume. Conversely, if the temperature decreases, the gas's volume will also decrease because the gas molecules move less energetically and take up less space. This direct relationship is fundamental in understanding gas behavior under changing temperature conditions within a controlled pressure environment.

Understanding this law is crucial in various applications, including those found in engineering, meteorology, and even cooking, where temperature and volume interactions are significant.