Problem 1 (20 points): Water in a closed system undergoes a thermodynamic process from P, = 100 kPa and T 1 = 125 C to P, = 800 kPa, and Ty= 400 C. If the mass of water in the system is 3.0 kg, determine: (a) the change in specific volume, Av.2, in [m/kg), (b) the change in specific enthalpy, Ah 1-2, in (kJ/kg), and () the change in total enthalpy, AH-2, in [k]], of the water. Air in a closed system undergoes a thermodynamic process from P, = 100 kPa and T, = 125 C to P, = 800 kPa, and T2 = 400 C. If the mass of air in the system is 3.0 kg, determine: (d) the change in specific volume, Av1-2, in [m/kg), and (e) the change in specific enthalpy, Ah 1-2, in (kJ/kg), and (f) the change in total enthalpy, AH-2, in [k]], of the air. Hint: Evaluate the specific heats of air at 550 K. For Water: 1.2 = Ah2= AH-2= For Air: 2 = Ah-2= -2=