A spring-loaded piston-cylinder device contains 50 g of carbon dioxide that is initially at 100 kPa and 23C (State 1). Heat is added until the gas reaches 800C, at which point the pressure is 200 kPa (State 2). (a) Determine the boundary work (kJ) done by the CO2. Assume the spring is linear. (b) Determine the amount of heat transfer (kJ) into the CO2. Assume the specific heats of CO2 are constant and given by their values at 300 K.