These problems are in a cycle context. In this cycle, air is first compressed in a piston-cylinder cylinder assembly in an adiabatic process. Heat is then added with the volume held constant to raise the pressure. Then it is expanded in an adiabatic process. Then heat is removed to bring the pressure back down to the original pressure. During these compression and expansion processes, the pressure-volume relationship can be approximated by PVn = constant, where n is approximately 1.4. The initial volume of the cylinder is 1 m3 (a really big engine cylinder) and it is at one atmosphere of pressure. It is compressed to a volume of 0.1 m3. At this same volume, heat is added to increase the pressure to 50 atmospheres and then the air expands back to 1 m3. Then heat is removed to bring the pressure back down to 1 atmosphere with the volume held constant at 1 m3
What is the net heat added to the cylinder for one cycle (heat in less heat out)?