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Problem on Ideal gas process

A) Air at 4MPa and 3000C enters a will insulated turbine operating at steady state with negligible velocity. The air expands to an exit pressure of 100KPa. The exit velocity and temperature are 90 m/s and 1000C respectively. The diameter of the exit is 0.6m. Determine the power developed by the turbine (in KW). You may assume air behaves like an ideal gas throughout the process.

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B) A rigid vessel contains 5 kg of staurated liquid water and 0.5 kg of saturated vapour at 10 kpa. What amount of heat must be transferred to the system to evaporate all the liquid?

C) A rigid vessel contains 5kg of saturated liquid water and 0.5kg of saturated vapour at 10 KPa. What  amount of heat must be transferred to the system to evaporate all the liquid?

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