A flash drum is separating a saturated liquid feed at $1$ atm that is $50$ mol$\%1-$propanol $($or n$-$propanol, component $1)$ and $50$ mol$\%$ isopropanol $($component $2)$ with F $=1000$ kmol$/$hr$.$ The flash drum operates at $90\backslash$deg C and $1$ atm. The Antoines equation for both components are

where Pisat is in mmHg and T is in $\backslash$deg C$.($a$)$ Using the information above, determine the isopropanol composition.$log{P}_1^{\text{s}\text{a}\text{t}}=7\mathrm{.}84767-\frac{1499\mathrm{.}2}{T+204\mathrm{.}64},log{P}_2^{\text{s}\text{a}\text{t}}=8\mathrm{.}11778-\frac{1580\mathrm{.}9}{T+219\mathrm{.}61}$

is in $mmHg$ and $T$ is in $C$