@property<EOL><INDENT>def JTl(self):<DEDENT>
Vml, Cplm, isobaric_expansion_l = self.Vml, self.Cplm, self.isobaric_expansion_l<EOL>if all((Vml, Cplm, isobaric_expansion_l)):<EOL><INDENT>return Joule_Thomson(T=self.T, V=Vml, Cp=Cplm, beta=isobaric_expansion_l)<EOL><DEDENT>return None<EOL>
r'''Joule Thomson coefficient of the liquid phase of the mixture if one
        exists at its current temperature and pressure, in units of [K/Pa].

        .. math::
            \mu_{JT} = \left(\frac{\partial T}{\partial P}\right)_H = \frac{1}{C_p}
            \left[T \left(\frac{\partial V}{\partial T}\right)_P - V\right]
            = \frac{V}{C_p}\left(\beta T-1\right)

        Examples
        --------
        >>> Mixture(['dodecane'], ws=[1], T=400).JTl
        -3.193910574559279e-07