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thermodynamics: Diffusers, find the exit velocity ..

Air at 80 kPa, 27 degrees C and 220 m/s eneters a diffuser at a rate of 2.5 kg/s and leaves at 42 degrees C. the exit area of the diffuser is 400 cm2.the air is estimated to lose heat at a rate of 18 kJ/s during this process.

Determine

-The exit velocity

-The exit pressure of the air

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