Air enters the heating section of an air-conditioning at 1 atm, 10 c, and 70 percent relative humidity at a rate of 35 m'/min, and it leaves the humidifying section at 20 c with a relative humidity of 90 percent. if the humidifier supplies wet steam at 100°c, determine (a) the temperature and relative humidity of the air leaving the heating section (b) the rate of heat transfer in the heating section