An insulated rigid tank contains two chambers. Steam at 300 kPa and 500 K is contained in one chamber with a volume of 0.9 m³. Saturated liquid at 300 kPa is contained in the other chamber with a volume of 0.01 m³. The steam two chambers is suddenly mixed when the wall dividing the two chambers is punctured.

A. Determine the final temperature and pressure of the steam.

B. Determine the change in entropy of the system during the process.

C. Why does the entropy increase in this process?