Moist air at 12oC and 80% R.H. enters a duct at a rate of 150 m3/min. The mixture is heated until it exits at 35oC. The pressure remains constant at 100 kPa. Determine (a) the rate of heat transfer, and (b) the relative humidity at the exit. What-if-scenario: How would the conclusion change if the mixture were heated until it exits at 50oC?