\param{temp (float):}{ Temperature (K)\\}
\param{press (float):}{ Pressure (Pa)\\}
\param{x (array\_like):}{ Molar composition\\}
\param{phase (int):}{ Calcualte root for specified phase\\}
\param{dvdt (logical, optional):}{ Calculate volume differentials with respect to temperature while pressure and composition are held constant. Defaults to None.\\}
\param{dvdp (logical, optional):}{ Calculate volume differentials with respect to pressure while temperature and composition are held constant. Defaults to None.\\}
\param{dvdn (logical, optional):}{ Calculate volume differentials with respect to mol numbers while pressure and temperature are held constant. Defaults to None.\\}