As gas temperature increases under constant pressure, what happens to its volume?

When the temperature of a gas increases while maintaining constant pressure, the volume of the gas increases. This relationship is described by Charles's Law, which states that for a given mass of gas at constant pressure, the volume is directly proportional to its absolute temperature (measured in Kelvin).

As the temperature rises, the kinetic energy of the gas molecules also increases. This heightened energy causes the molecules to move more vigorously and occupy more space, resulting in an increase in volume.

Thus, as temperature increases, the volume expands to accommodate the faster-moving molecules, allowing the gas to occupy a larger space while the pressure remains unchanged. This fundamental behavior of gases under varying conditions is key to understanding gas laws and illustrates how temperature influences the physical properties of gases.