The universal gas constant is given by, R=C′p−C′v R=mCP−mCV R=m(Cp−Cv) Here, C′P and C′V are the molar specific heat of gas at constant pressure and constant volume. Substituting the values, we get R=m(620−420) m=
R
200
Using the ideal gas equation, pV = nRT pm = ρRT (As,n=1andρ=