time derivative of specificEntropy_phX
function specificEntropy_phX_der extends Modelica.Icons.Function; input AbsolutePressure p; input SpecificEnthalpy h; input MassFraction X[nX] "Mass fractions"; input ThermodynamicState state; input Real p_der "time derivative of pressure"; input Real h_der "time derivative of specific enthalpy"; output Real s_der "time derivative of specific entropy"; end specificEntropy_phX_der;