An isolated chamber with rigid walls is divided into two equal compartments, one containing steam at 10 bar and 370^◦C, and the other evacuated. A valve between the compartments is opened to permit steam to pass from one chamber to the other.

a. After the pressures (but not the temperatures) in the two chambers have equalized, the valve is closed, isolating the two systems. What are the temperature and pressure in each cylinder? 

b. If the valve were left open, an equilibrium state would be obtained in which each chamber has the same temperature and pressure. What are this temperature and pressure?