State Charles’ law and give its formula.

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Charles’ law:

At constant pressure, volume of a fixed mass of gas is directly proportional to its absolute temperature.

Mathematically,

V ∝ T … ( at constant pressure)

∴ V = kT

where k is constant of proportionality 

∴ \(\frac{V}{T}\) = k = constant

For two gases, \(\frac{V_1}{T_1}=\frac{V_2}{T_2}\) = constant.

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