According to Charles’s law, if the pressure of a gas is held constant, increasing the temperature of the gas increases its volume.
Q&A
Q: What happens when a gas is heated?
A: Its particles gain energy. With more energy, the particles have a greater speed. Therefore, they can move more and spread out farther. The volume of the gas increases as it expands and takes up more space.
Another way of expressing this law is: This means that the ratio between the volume of a gas and its temperature is constantRelationship between initial and final volume of a gas when temperature changes
So, if a gas occupies a volume V1 at an absolute temperature T1, and at another temperature T2 would occupy a volume V2, the relationship between all these magnitudes is: