• Air enters the diffuser of a certain jet engine at 40 kPa and 290 K with a velocity of 3800 km/h and is decelerated to a low velocity at the exit of the diffuser of the engine. The heat addition in the combustion chamber is 1200 kJ/kg. The air exits the nozzle at 25 kPa. The pressure at the diffuser exit, in kPa, is most nearly equal to how much?