A piston-cylinder device with a set of stops initially contains 0.3 kg of air at 10 atm and 400?C. The location of the stops corresponds to 60% of the initial volume. The gas now undergoes cooling and the piston drops, maintaining a constant pressure until it reaches the stops. The cooling process continues until the temperature has dropped to 25?C. a) Determine the work done and the heat transferred during the cooling process up to the point when the piston reaches the stops. b) What is the final pressure in the cylinder? c) How much heat is lost to the surrounding during the entire process?