An adiabatic piston cylinder contains 1 kg of R-134a. Initially the conditions inside the piston are 200 kPa and 0 degrees C. An electric heater inside the device runs with constant voltage of 110 V and a constant 0.1A of current for one hour. If the system is then compressed with an additional 18.3 kJ of energy until the final pressure inside the device reaches 500 kPa, determine the entropy generated for this process.