A dehumidifier was used to cool saturated air from 40 degrees Celsius to 35 degrees Celsius. The entering water mass velocity is 2500 kg/m²-hr, while the dry air mass velocity is 1000 kg/m²-hr. The water is at 20 degrees Celsius. The overall heat transfer coefficient based on the air is 200 W/m³-K. If the air enters at 2000 L/min, what will be the absolute humidity of the entering air in kg. dry air per kg. water?