Air at 1 atm, 13oC and 50% relative humidity is first heated to 18oC in a heating section and then humidified by introducing saturated water vapor at 1 atm. Air leaves the humidifying section at 22oC and 60% of relative humidity. Determine
(a) The amount of steam added to the air in kg H2O/kg dry air and
(b) The amount of heat transfer (q) to the air in the heating section in kJ/kg dry air.