Example 8.20

 Part A:
 There is heat loss to surrounding.

 Part B:
 The polytropic index is 1.331834 

 Part C:
 Isothermal efficiency is 97.880274 percent 

 Part D:
 The minimum work input is -101.404347 kJ/kg, and irreversibility is 14.034153 kJ/kg

 Part E:
 Second law efficiency is 88 percent