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Two insulated containers are connected through an insulated line and a valve that is closed. Both...

Two insulated containers are connected through an insulated line and a valve that is closed. Both sides contain 1 kg of steam but the left side is at 300 °C while the right side is at 200 °C. The valve is opened, allowing both sides to mix and reach a common temperature and pressure.
a) Is this process reversible?
b) What is the final pressure and temperature of the steam, if the steam is treated as an ideal gas?
c) Comment on whether it is reasonable to treat steam as an ideal gas under these conditions.

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