A insulated vessel is divided by a partition into two parts. Initially, the left side contains steam at 300C, 20 bar, and the right side is evacuated. Then, the partition is suddenly removed; the final pressure is measured as 10 bar.

1)  Using the steam tables, calculate the final temperature and molar volume.

2)  Using the results of part 1), compute the entropy change.

3)  Now treating the steam as an ideal gas, again compute the nal T and V.

4) (Using the results of part 3), compute the entropy change.