A $1\mathrm{.}0-$mm$-$thick square $(100mm100mm)$ sheet of polymer is suspended from a precision scale in a chamber characterized by a

temperature and relative humidity of $T=300K$ and $=0,$ respectively. Suddenly, at time $t=0,$ the chamber's relative humidity is

raised to $=0\mathrm{.}95.$ The measured mass of the sheet increases by $0\mathrm{.}012mg$ over $24h$ and by $0\mathrm{.}016mg$ over $48h.$ Determine the

solubility, in kmo$\frac{l}{m^3}*$ bar, and mass diffusivity, in $\frac{m^2}{s},$ of water vapor in the polymer. Preliminary experiments have indicated that the

mass diffusivity is greater than $710-13\frac{m^2}{s}.$

$S=-,$kmo$\frac{l}{m^3}*$ bar