What is Charles' law formula?

1 Answer
Jun 27, 2014

The physical law that the volume of a fixed mass of gas held at a constant pressure varies directly with the absolute temperature.

This law states that the volume of a given amount of gas ,at a constant pressure gas varies with its temperature

or simply we can say that the volume of gas changes with its temperature. At a higher temperature , a gas will take up more volume ( expands) , at a lower temperature, a gas will take up lesser volume or it contracts.

Let us suppose that we have a given amount of gas enclose in a balloon, the temperature of the gas is T1 (Kelvin) , and it takes up the volume V1 (Liter). If the Temperature is changed to a new value called T2 , then the volume changes to V2.

as per the law the ratio of Volume / temperature stays the same, if one increases , the other decreases but the ratio does not change.

V1 / T1 = k ......(a)

V2 / T2 = k ......(b)

equating the two equations (a) and (b)

V1 / T1 = V2 /T2

or

V1 . T2 = V2 . T1