Problem 4: In the following system, a 100 kg mass drops 3 m which causes the inside gas of an insulated chamber (adiabatic) to expand by 0.002 m³. The net pressure acting on the piston is 200 kPa. Determine the change in total energy and the change in the total internal energy of the system. Neglect the change in kinetic and potential energy of the gas. Consider the gas inside the chamber as the thermodynamic system. Use g = 9.81 m/s².Ans: 2543 J