QUESTION 3: Gas Turbine Cycle The compressor and turbine of a simple gas turbine each have isentropic efficiencies of 90%. The compressor pressure ratio is 12. The minimum and maximum temperatures are 290 K and 1400 K, respectively. On the basis of an air-standard analysis, determine the following: I. The ideal specific work of the turbine: (a) 747.05 W (b) 300.6 kJ/kg (c) 672 W (d) 747 kJ/kg II. The actual net work per unit mass of air flowing in the system (a) 338.3 kJ/kg (c) 446.2 kJ/kg (b) 446.2 W (d) 303.4 kJ/kg III. The heat rejected per unit mass of air flowing in the ideal system (a) 544.2 kJ/kg (c) 420.2 kJ/kg (b) 478.2 kJ/kg (d) 393.2 kJ/kg IV. The heat rejected per unit mass of air flowing in the real system (a) 489.2 kJ/kg (c) 593.3 kJ/kg (b) 552.92 kJ/kg (d) 640.9 kJ/kg V. The thermal efficiency of the irreversible system (a) 48.28% (c) 37.96 % (b) 56.54% (d) 22.45% VI. The thermal efficiency of the reversible system (a) 48.28% (c) 37.96 % (b) 56.54% (d) 22.45%