V/T = constant
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The meaning of the Charles law is that in a closed system the volume is strictly and directly related to the temperature, at constant pressure:
V/T=k
An increase of temperature involve an increase of the volume.
The physical principle known as Charles' Law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale.
If you means Charles Law, it has to do with gasses expanding and contracting as they are heated or cooled.
The volume is directly proportional to temperature at constant pressure.
You might use the Boyle's Law and Charles' Law when you are dealing with a kinetic theory question.
The ideal gas law, PV=nRT, combines Boyle's Law (P1V1 = P2V2), Charles's Law (V1/T1 = V2/T2), and relates the pressure and temperature of a gas when the volume is held constant.
Charles' Law relates absolute temperature and volume for fixed mass or moles of gas atconstant pressure. Charle's Law may be written as :V/T = Constant .........or........ as T/V = Constant
Boyle's Law. See related link below.