$100$ kmol$/$h feed mixture of $25$ mol$\%$ n$-$hexane$(1),40$ mol$\%$ n$-$heptane$(2),$ and $35$ mol$\%$ n$-$octane$(3)$ at

$400$K and $2$ bar total pressure is fed to a flash unit. Show that if the mixture separate into two phases.

Calculate the amounts and compositions of the liquid and the vapor products. Assume the solution to be

ideal.

K values: K$1=2\mathrm{.}326,$ K$2=1\mathrm{.}0885,$ K$3=0\mathrm{.}525$