Which gas law describes the relationship between volume and temperature?

Charles's Law describes the relationship between volume and temperature for a gas, illustrating how the volume of a gas increases with an increase in temperature, provided the pressure remains constant. This relationship is based on the direct proportionality between volume and temperature when measured in Kelvin, meaning when you heat a gas, its particles gain kinetic energy, causing them to move apart and thereby increasing the volume. This is a fundamental principle in gas behavior, and it allows for the understanding of how gases expand or contract as their temperature changes.

For example, if you were to take a balloon filled with air and place it in a warm environment, the balloon would expand as the air inside heats up. This practical observation aligns perfectly with Charles's Law, highlighting the significant effect of temperature changes on gas volume.