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 #T_1# (Kelvin) , and it takes up the volume #V_1# (Liter). If the Temperature is changed to a new value called #T_2# , then the volume changes to #V_2#.

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

#V_1# / #T_1# = k ......(a)

# V_2# / #T_2# = k ......(b)

equating the two equations (a) and (b)

#V_1# / #T_1# = #V_2# /#T_2#

or

#V_1# . #T_2# = #V_2# . #T_1#