@property<EOL><INDENT>def Zl(self):<DEDENT>
Vml = self.Vml<EOL>if Vml:<EOL><INDENT>return Z(self.T, self.P, Vml)<EOL><DEDENT>return None<EOL>
r'''Compressibility factor of the chemical in the liquid phase at the
        current temperature and pressure, [dimensionless].

        Utilizes the object oriented interface and
        :obj:`thermo.volume.VolumeLiquid` to perform the actual calculation of
        molar volume.

        Examples
        --------
        >>> Chemical('water').Zl
        0.0007385375470263454