Air is contained in a light, frictionless piston-cylinder device. A mass, M sits on the piston. The initial pressure in the cylinder is 200kPa and the initial temperature is 20C. The area of the piston is 0.1m^2 and it initially rests at a height of 200mm. Heat is then added so that the air expands in a constant pressure process to a new height of 400mm. Take Rair=287 J/kgK; Cpair=1004J/kgK

a) Calculate the mass of the gas in the cylinder

b) Calculate the mass, M, that sits on the piston

c) What is the final temperature of the air?

d) How much heat was added?

e) Calculate the work done in the process.