The air supply for a drier has a dry bulb temperature of 38 °C and a wet bulb temperature of 25 °C. It is heated to 98 °C by coils and blown into the dryer. In the dryer, it cools following adiabatic cooling process as it picks up the moisture from dehydrating material and leaves the dryer fully saturated.

i. What is the dew point of initial air

ii. What is its humidity (kg of H2O/kg dry air) 

iii. What is its % relative humidity 

iv. How much heat (kJ) is needed to heat 1000 L to 98 °C. 

v. How much water (kg) will be evaporated/1000 L of air entering the dryer 

vi. At what temperature (°C) does air leave the dryer