An adiabatic mixing chamber receives a flow of 1 kg/s steam at 400 kPa, 600 degree C and a flow of 2 kg/s steam at 1000 kPa, 200 degree C which is being throttled down to 400 kPa. The steady flow exits at 400 kPa. a) What is the exit temperature? b) Find the total entropy generation rate.