ASAP EXAM QUESTION

$(50$ pts$)$ A steam stripper is used to recover solvent from a dilute water solution.

The dilute solution entering the stripper contains $3\mathrm{.}70wt\%$ solvent, the liquid

leaving the stripper contains $2\mathrm{.}75{10}^{-4}$ mass fraction of solvent, and the gas

leaving the stripper contains $65$mole$\%$ solvent and the remainder water vapor.

The molecular weight of the pure solvent is $56.$

Steam $($pure water vapor$)$ is supplied to the stripper in the ratio of

$0\mathrm{.}160lb$ steam $/lb$ dilute feed solution.

Determine

$($a$)$ mass fraction of solvent in the gas product

$($b$)$ fraction of solvent in the feed recovered in the gas product