A solid material wet with toluene is dried in an adiabatic drier to recover toluene and

to produce dry solids. The drier is fed with of an air$-$toluene mixture at

$101\mathrm{.}3$kPa and $333K$ with a wet$-$bulb temperature of $305K.$ The gases leave the drier

at $310K$ DBT with relative saturation of $95\%.$ The vapour pressure of toluene is given

by the Antoine equation

where pressure is in kPa and temperature is in $K.$ The latent heat of vaporization is $404$

$k\frac{J}{k}g$ and the psychrometric ratio for the toluene$-$air system is $1\mathrm{.}88k\frac{J}{k}gK.$ Determine

the following:

$($a$)$ The toluene evaporated in the drier, $(k\frac{g}{h})($the answer: $17\mathrm{.}24$ kg$/$h$)$

$($b$)$ The volume of gases leaving the drier, $(\frac{m^3}{h})($answer: $97\mathrm{.}99$m$^3/$h$)$