The gas inside the piston–cylinder assembly in Figure P4.16 has a volume of 0.1 m3 and a pressure of 100 kPa. This pressure balances the weight of the piston exactly such that there is no stress...

The gas inside the piston–cylinder assembly in Figure P4.16 has a volume of 0.1 m3 and a pressure of 100 kPa. This pressure balances the weight of the piston exactly such that there is no stress exerted on the spring. Heat in the amount of 130 kJ is transferred to the gas changing its state to 300 kPa and 0.2 m3 . During the process the force acting on the spring is proportional to the displacement of the piston. a. Draw this process in a p–v diagram. b. Find the work of the system and the percentage of work done on the spring. c. Find the changes in internal energy and enthalpy.