At constant pressure, what effect does an increase in temperature have on the volume of a gas?

The volume of a gas at constant pressure is directly related to its temperature, a relationship defined by Charles's Law. According to this law, when the temperature of a gas increases, it causes the gas particles to move more rapidly. This increased movement leads to a greater distance between the particles, which, in turn, results in an expansion of the gas and thus an increase in its volume.

At constant pressure, the gas has the ability to expand to occupy more space as the temperature rises. Therefore, the correct choice reflects this direct relationship, confirming that an increase in temperature indeed results in an increase in the volume of the gas.

In scenarios where pressure remains constant, if the temperature rises and the volume does not increase, this would contradict the fundamental principles of gas behavior described by the gas laws, indicating that such outcomes are not supported under typical conditions.