Argon gas flows through a rigid nozzle at steady-state-steady flow. The inlet flow velocity is small. THe gas exits the nozzle at 450 m/s with mass flowrate of 88 kg/s and exit area of .10 m^2/ Heat transfer and potential energy is negligible. THe process does not follow a quasi-equilibrium path due to internal friciton. Include a T-s process diagram showing the actual states and the theoretical. Find the entropy production rate for the process and nozzle efficiency.