Air enters the compressor of an ideal gas Brayton power cycle operating at steady-state at 100 kPa and 300 K. The compressor pressure ratio is 10. The turbine inlet is 1400 K. Assume the turbine and the compressor processes are adiabatic and that kinetic and potential energy effects are negligible.
1) The turbine power output in kJ/kg is:

a) 935.5. b) 706.9. c) 279.7. d) cannot be determined.

2) The compressor work input in kJ/kg is:

a) 935.5. b) 706.9. c) 279.7. d) cannot be determined.

3) The thermal energy input to the working fluid in kJ/kg is:

a) 935.5. b) 706.9. c) 279.9. d) cannot be determined.

4) The net work input to the working fluid in kJ/kg is:

a) 935.5. b) 508.3. c) 427.2. d) cannot be determined.

5) The thermal efficiency of the cycle is:

a) 39%. b) 46%. c) 75%. d) cannot be determined.