Return specific heat capacity as a function of pressure p, temperature T and composition X
function cp_pTX input Modelica.SIunits.AbsolutePressure p "Pressure"; input Modelica.SIunits.Temperature T "Temperature"; input Modelica.SIunits.MassFraction X[:] "Mass fractions "; output Modelica.SIunits.SpecificHeatCapacity cp "Specific heat capacity"; end cp_pTX;