A piston cylinder device contains 0.01 m3 of steam at 500 kPa and 300oC. Determine the change

Question:

A piston cylinder device contains 0.01 m3 of steam at 500 kPa and 300oC. Determine the change in stored energy (E) if
(a) The pressure is increased to 1 MPa at constant temperature
(b) Temperature is increased to 400oC at constant pressure. Use the PC (phase-change) system state daemon.