A piston/cylinder of total 1 kg steel contains 0.5 kg ammonia at 1600 kPa both masses at 120oC. Some stops are placed so a minimum volume is 0.02 m3, shown in Fig. P8.85. Now the whole system is cooled down to 30oC by heat transfer to the ambient at 20oC, and during the process the steel keeps same temperature as the ammonia. Find the work, the heat transfer and the total entropy generation in the process.