Assignment:
It is desired to dry 10 kg/min of soap continuously from 20% moisture by weight to 4% moisture in a countercurrent stream of hot air. The air enters the dryer at the rate of 30.0 m3/min at 350 K, 101.3 kPa, and an initial watervapor partial pressure of 2 kPa. The dryer operates at constant temperature and pressure.
(a) Calculate the moisture content of the entering air, in kg of water/kg of dry air.
(b) Calculate the flow rate of dry air, in kg/min.
(c) Calculate the water-vapor partial pressure and relative humidity in the air leaving the dryer.
Provide complete and step by step solution for the question and show calculations and use formulas.