4. Nitrogen at 80 kPa and 400 K steadily enters an adiabatic diffuser at a flow rate of 3600 kg/h, and235 m/s and exits at 100 kPa at 30 m/s.

(12 points) (a) Draw a schematic diagram and describe the main function of diffuser (2 points) (b) Find the N2 temperature at exit (6 points) (c) The cross-section area at the exit of the diffuser (4 points)