EXERCISE

$5\mathrm{.}3\mathrm{.}1$: Reading a methanol$-$water P$-$xy diagram.

The bubble and dew points of two$-$component mixtures containing methanol $(C{H}_{3}OH)$ and water $(H_{2}O)$ at $85C$ can be summarized in a figure.

metranui mule mactum

$($a$)$ Label the liquid, vapor, and $2-$phase regions of the diagram.

$($b$)$ The dew point pressure of a mixture containing $70$mol$\%$ methanol should be $mmHg.$

$($c$)$ The bubble point pressure of a mixture containing $80$mol$\%$ water should be $mmHg.$

$($d$)$ The vapor pressure for pure water at $85C$ can be found from the P$-$xy diagram as $mmHg.$