What happens to gas volume when the temperature increases, assuming pressure is constant?

When the temperature of a gas increases while maintaining constant pressure, the volume of the gas increases. This behavior can be explained by Charles's Law, which states that the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin) when the pressure is held constant.

As the temperature rises, the kinetic energy of the gas molecules also increases, causing them to move more vigorously. This increased molecular motion causes the gas to expand, leading to an increase in volume. Therefore, the result of increasing the temperature under constant pressure conditions is that the gas occupies a larger volume.

The other options do not accurately reflect the behavior of gases according to the fundamental principles of gas laws. For instance, a decrease in volume with an increase in temperature would contradict the established understanding of gas behavior. Similarly, the assertion that the volume remains the same or that the gas becomes a liquid does not apply under the stated conditions of constant pressure and rising temperature.