Question $5$ Mass Transfer & Unit Operations $-$ Distillation $(15$ points$)$

For each of the distillations D$-1$ and D$-2$ in Figure $3$ below, establish the type of condenser and an operating pressure. determine bubble$-$points and dew$-$points.

m: $.....2$

For the process in Figure $4$ below, calculate the minimum number of equilibrium stages using both the Fenske equation and Aspen. to determine K$-$values use the Fenske equation. Is it feasible to employ cooling water at $25C$ as a coolant if a minimum temperature difference of $20C$ is required? Justify your answer.

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