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An unknown ideal gas enters a 25 cm-diameter pipe steadily at 250 kPa and 47C with...

An unknown ideal gas enters a 25 cm-diameter pipe steadily at 250 kPa and 47C with a velocity of 5 m/s. The ideal gas gains heat as it flows and leaves the pipe at 77C and 225 kPa. The gas constant of the ideal gas is R=0.285 kJ/kg.K. Determine:
a) the volume flow rate at the inlet

b) the mass flow rate

c) the velocity at the exit

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