An ideal gas mixture consisting of 30% N2, 50% O2, and 20% CO2 (by volume) enters an insulated turbine at 1350 K and 1.50 MPa. The mixture exits at 850 K. The mass flow rate of the mixture is 7.5 kg/s. Determine the power produced (a) assuming constant specific heats for the gases, evaluated at 300 K, (b) assuming constant specific heats for the gases, evaluated at 1100 K, and (c) considering the specific heats to be variable.
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