4. A system is being constructed to separate 1 kg/s of a gas assumed to be 20% oxygen and 80% nitrogen by mass ratio. The gas enters the system at 150 kPa, 10 C. Pure oxygen exits at 100 kPa, 20 C and pure nitrogen exits at 140 kPa, 30 C. Any heat transfer is with the surroundings at 20 C. Is an electrical power input of 3000 kW sufficient to drive the system? & kg kemol