1 A piston-cylinder device initially contains 0.4 m of air at 100 kPa and 80C. The air is now compressed to 0.1 m in such a way that the temperature inside the cylinder remains constant. Determine the work done during this process. To = 80C = const. AIR V =0.4 m P = 100 kPa T = 80C = const. 0.1 0.4 V, m 2 From memory, illustrate the polytropic process and regional division on p-v and T-s diagrams,