Question from Process Calculation $-$ A food drying process requires an air stream$($flow rate $10$m$^3/$s$)$ to be heated from $20$C$,80\%$ RH $($state $1)$ to a dry bulb temperature of $50$C $($state $2)$ before the air enters the food chamber.

Determine:

$($i$)$ The properties of air at both states.

$($ii$)$ If the drier has an inlet air flow of $10$ m$^3/$s$,$ what is the required rate of heat input required to raise the temperature of the air from $20$C to $50$C$?$