Hot nitrogen gas at 400oC and atmospheric pressure flows into a waste-heat boiler at the rate of 20 kg s-1, and transfers heal to water boiling at 101.33 kPa. The water feed to the boiler is saturated liquid at 101-33 kPa, and it leaves the boiler as superheated steam at 101.33 kPa and 150oC. If the nitrogen is cooled to 170oC and if heat is lost to the surroundings at a rate of 540 kJ for each kilogram of steam generated, what is the steam-generation rate? If the surroundings are at 25oC. what is G for the process? Assume nitrogen to be an ideal gas for which Cp = (7/2)R?