3 kg of air in a closed movable container undergoes a fewprocesses. Initially, the air with P1=330kPa and T1=70°C is cooledwithout producing any work until P2= 100kPa, and then it isexpanded according to PVn=cont, where n=1.84 until the volume isdouble. The air again will be heated without changing the volumeuntil the temperature of the air increase to the initialtemperature. It is then cooled with constant pressure until thevolume becomes 0.5m3. The air undergoes isothermal compressionprocess with Wb=-130kJ. Finally, the air undergoes a polytropicexpansion to the initial state.
1.1. Sketch the P-V diagram
1.2. Find all P’s, V’s and T’s
1.3. Calculate all Q’s
1.4. Determine the nett work of the cycle
