der(Specific Heat Capacity at fixed P) computation for Dry Air Ideal Gas (inputs: T, der(T))
function SpecificHeatCp_derT input Units.SI.Temperature T "Temperature (K)"; input Real der_T "Temperature time derivative (K/s)"; output Real der_Cp "Specific Heat Capacity time derivative (J/kg/K/s)"; end SpecificHeatCp_derT;