= Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammonia is saturated vapor at p1 120 lbf/in. Process 1-2 involves cooling at constant pressure until x2 = 75%. The second process, from state 2 to state 3, involves heating at constant volume until X3 = 100%. Kinetic and potential energy effects are negligible. For 1 lb of ammonia, determine (a) the heat transfer and work for Process 1-2 and (b) the heat transfer for Process 2-3, all in Btu. -130.6 Btu, -158.6Btu, 137.7 Btu -200.6 Btu, -148Btu, 117Btu -13.6 Btu, -128 Btu, 117 Btu -16 Btu, -156Btu, 143Btu -123 Btu, -103.6 Btu, -108 Btu