A rigid storage tank has a total volume of 5.00 m³ and is sealed throughout the process. Initially, the storage tank contains 0.50 m³ of saturated liquid water at P = 5 bar, while the rest of the tank is filled with saturated steam at the same pressure. The tank gradually cools until the liquid vapor system is at P = 4 bar (Figure 3-9). How much heat was lost to the surroundings during this process, and what are the final volumes of liquid and vapor?