7. A three- process cycle of an ideal gas, for which c 1.064 and c 0.804 kJ/kg K is initiated by an isentropic compression 1-2 from 103.4 kPa, 27C to 608.1 kPa. A constant volume process 2-3 and a polytropic 3- with n-1.2 complete the cycle. Circulation is a steady rate of 0.905 kg/s, compute (a) QA. (b) W. (c) e, (d) pm Ans. (41.4 kJ/s; (b) -10 kJ/s: (c) 24.15%; ( d ) 19.81 kPa