Specific entropy of moist air
function s_pTX extends Modelica.Icons.Function; input SI.AbsolutePressure p "Pressure"; input SI.Temperature T "Temperature"; input SI.MassFraction X[:] = Modelica.Media.Air.ReferenceMoistAir.reference_X "Mass fractions"; output SI.SpecificEntropy s "Specific entropy"; end s_pTX;