A cylinder fitted with a piston has an initial volume of 0.1 m3 and contains nitrogen at

Question:

A cylinder fitted with a piston has an initial volume of 0.1 m3 and contains nitrogen at 100 kPa, 25oC. The piston is moved, compressing the nitrogen until the pressure is 1.5 MPa and the temperature is 200oC. During this compression process heat is transferred from nitrogen to the atmosphere at 25oC, and the work done on the nitrogen is 30 kJ. Determine
(a) The amount of this heat transfer.
(b) The entropy generation during the process. Use the PG model for nitrogen.