Air at 420K, 130 kPa and a velocity of 40 m/s enters a nozzle operating at a steady state and expands adiabatically to t

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Air at 420K,
130 kPa and a velocity of 40
m/s enters a nozzle
operating at a steady state and expands adiabatically to the exit,
where the pressure is 85 kPa and a velocity
of 310 m/s . The air is modeled as an
ideal gas. For the nozzle find the following. a, the temperature at
the exit in K. b, the isentropic nozzle efficiency. c, draw the T-s
diagram.