An adiabatic cylinder which contains an adiabatic frictionless piston Is connected to A steam pressure line. State 1: The volume under the piston is V = 0.2 m, there is vacuum pressure. At a certain moment the valve opens and steam enters the cylinder. After that the valve closes, at this state the mass in the cylinder is m = 5 kg, pressure is P = 1.4 MPa, temperature is T = 800 C. Ambiant temperature and pressure are given: Po = 100 kPa, To 20 C. a. Find the exergy of the tank at the initial state [KJ]. b. Find the exergy of the tank at the final state [KJ].