Air (an ideal with constant specific heats, cp = 1.005 kJ/kg-K, cv = 0.718 kJ/kg-K, R = 0.287 kJ/kg-K) is trapped in a cylinder with a freely floating piston. The piston and cylinder are insulated from any heat transfer. Initially the air is at 100 kPa and 20 C. The diameter of the cylinder is 0.100 m and initial height of the piston (from the bottom of the cylinder to the bottom of the piston) is 0.2 m. a. Determine the mass of air in the cylinder and the mass of the piston (assume the ambient surrounding air pressure is 0 kPa absolute). A 80.0 kg block is suspended 0.5 m above the top of the piston (0.5 m from the top of the piston to the bottom of the block). It is released. The system comes to a final equilibrium position and state. b. Assuming no change in temperature of the piston or block, determine the final air pressure and temperature, and the final position of the piston (i.e. the distance between the bottom of the cylinder and the bottom of the piston, in the final state). c. Considering the result of part (b), what is the change in entropy of the air during the described process? Is this process reversible?