According to Charles's Law, how are volume and temperature related?

Charles's Law states that, at constant pressure, the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin). This means that as the temperature of a gas increases, its volume also increases, provided that the pressure remains the same. Conversely, if the temperature decreases, the volume decreases. This direct proportionality can be expressed mathematically as V/T = k, where V is the volume, T is the temperature, and k is a constant for a given quantity of gas.

This relationship highlights the fundamental behavior of gases under varying thermal conditions and is foundational within the ideal gas law framework. Understanding this direct relationship is crucial for applications in various scientific fields, including chemistry and physics, as it explains how gases expand when heated and contract when cooled.