def Cvgm(self):
        r'''Gas-phase ideal-gas contant-volume heat capacity of the mixture at
        its current temperature and composition, in units of [J/mol/K]. Subtracts R from
        the ideal-gas heat capacity; does not include pressure-compensation
        from an equation of state.

        Examples
        --------
        >>> Mixture(['water'], ws=[1], T=520).Cvgm
        27.13366316134193
        '''
        Cpgm = self.HeatCapacityGasMixture(self.T, self.P, self.zs, self.ws)
        if Cpgm:
            return Cpgm - R
        return None
def Cvgm(self):
        r'''Gas-phase ideal-gas contant-volume heat capacity of the mixture at
        its current temperature and composition, in units of [J/mol/K]. Subtracts R from
        the ideal-gas heat capacity; does not include pressure-compensation
        from an equation of state.

        Examples
        --------
        >>> Mixture(['water'], ws=[1], T=520).Cvgm
        27.13366316134193
        '''
        Cpgm = self.HeatCapacityGasMixture(self.T, self.P, self.zs, self.ws)
        if Cpgm:
            return Cpgm - R
        return None
def Cvgm ( self ) : Cpgm = self . HeatCapacityGasMixture ( self . T , self . P , self . zs , self . ws ) if Cpgm : return Cpgm - R return None
r'''Gas-phase ideal-gas contant-volume heat capacity of the mixture at
        its current temperature and composition, in units of [J/mol/K]. Subtracts R from
        the ideal-gas heat capacity; does not include pressure-compensation
        from an equation of state.

        Examples
        --------
        >>> Mixture(['water'], ws=[1], T=520).Cvgm
        27.13366316134193
r Gas - phase ideal - gas contant - volume heat capacity of the mixture at its current temperature and composition in units of [ J / mol / K ] . Subtracts R from the ideal - gas heat capacity ; does not include pressure - compensation from an equation of state .