What happens to the volume of a gas when its temperature is increased while its pressure remains constant?

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

As the temperature rises, the kinetic energy of the gas molecules increases, causing them to move more rapidly. This increased movement pushes the molecules further apart, thus expanding the volume of the gas. The direct correlation can be expressed mathematically as V1/T1 = V2/T2, indicating that if the temperature (T) goes up, the volume (V) must also go up to maintain the equality in the equation.

In summary, under conditions of constant pressure, increasing temperature results in an increase in volume due to the expanded motion of gas molecules.