A vertical cylinder has a 90-kg piston locked with a pin trapping 10 L of R-22 at

Question:

A vertical cylinder has a 90-kg piston locked with a pin trapping 10 L of R-22 at 10C, 90% quality inside. Atmospheric pressure is 100 kPa, and the cylinder cross-sectional area is 0.006 m2. The pin is removed, allowing the piston to move and come to rest with a final temperature of 10C for the R-22. Find the final pressure, final volume and the work done by the R-22.