An ideal gas mixture, consisting (by mass) of 25% N2, 20% O2, and 55% CO2, enters an insulated turbine at a mass flow rate of 5.5 kg/s, a pressure of 2.0 MPa, and a temperature of 700°C. The gases exit the turbine at a pressure of 100 kPa. Assuming constant specific heats for the mixture, determine the exit temperature and the power produced if (a) the process is isentropic, and (b) the isentropic efficiency of the turbine is 0.80.
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