Which gas law relates to the combined volume and temperature of a gas?

The correct answer highlights Charles's Law, which specifically addresses the relationship between the volume and temperature of a gas when the pressure remains constant. According to Charles's Law, the volume of a gas increases proportionally with an increase in temperature, provided the pressure does not change.

Mathematically, this relationship can be expressed as ( V \propto T ), meaning that if the temperature of a gas is raised, its volume will expand, and conversely, if the temperature decreases, the volume will decrease as well. This can be observed in practical applications such as balloons expanding in warm air or contracting in cold air.

This distinction is crucial in understanding gas behavior and the principles behind various gas laws, particularly in situations where temperature changes significantly affect gas states.