State Charles' law in brief.

(N/A) Charles' law states that for a fixed mass of a gas at constant pressure,the volume of the gas is directly proportional to its absolute temperature $(T)$.
Mathematically,this is expressed as:
$V \propto T$
$V = k_{2}T$
$\frac{V}{T} = k_{2} = \text{constant}$
Where $V$ is the volume,$T$ is the absolute temperature in Kelvin,and $k_{2}$ is a constant. For two different states of the same gas at constant pressure,the relationship is:
$\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}$