partial function vapourSpecificEntropy_dTxi extends TILMedia.BaseClasses.PartialVLEFluidObjectFunction; input SI.Density d "Density"; input SI.Temperature T "Temperature"; input SI.MassFraction[:] xi "Mass fractions of the first nc-1 components"; input TILMedia.Internals.TILMediaExternalObject vleFluidPointer; output SI.SpecificEntropy s_v "Specific entropy of vapour phase"; end vapourSpecificEntropy_dTxi;