DO NOT ASSUME THAT THE STEAM IS IDEAL GAS!!!

(25 pts) An insulated rigid tank A of 0.5m3 volume is connected to another rigid tank B of 0.25m3 volume. Initially, while tank A contains steam at 1.8MPa and 650C, tank B contains steam at 100kPa and 200C. The valve between the tanks is opened and steam flows from A to B until the temperature in tank A reaches 400C, at which point the valve is closed. The cooling coils placed in tank B keep the temperature of tank B constant at 200C throughout the process. Find the final pressures of tanks A and B, and calculate the amount of heat transferred from tank B assuming reversible process