In the manufacture of an active pharmaceutical ingredient $($API$),$ the API goes through a final purification step in which it is crystallized,

filtered, and washed. The washed crystals contain $47\mathrm{.}0\%$ water. They are fed to a tunnel dryer and leave the dryer at a rate of $155k\frac{g}{h}$

containing $6\mathrm{.}00\%$ adhered moisture. Dry air enters the dryer at $145F$ and $1$atm, and the outlet air is at $125F$ and $1$atm with a

relative humidity of $40\mathrm{.}0\%.$ Calculate the rate $(k\frac{g}{h})$ at which the API enters the dryer and the volumetric flow rate $(ft\frac{3}{h})$ of inlet air.

API rate:

i

$1k\frac{g}{h}$

Dry air in:

i

$f\frac{t^3}{h}$