A distillation column with two feeds is separating ethanol from water. The first feed is \(60 \mathrm{wt} \%\) ethanol, has a total flow rate of \(1000 \mathrm{~kg} / \mathrm{h}\), and is a mix of liquid and vapor at \(81^{\circ} \mathrm{C}\). The second feed is \(10 \mathrm{wt} \%\) ethanol, has a total flow rate of \(500 \mathrm{~kg} / \mathrm{h}\), and is liquid at \(20^{\circ} \mathrm{C}\). Bottoms product is \(0.01 \mathrm{wt} \%\) ethanol, and distillate product is \(85 \mathrm{wt} \%\) ethanol. The column operates at 1 \(\mathrm{kg} / \mathrm{cm}_{2}\) and is adiabatic. The column has a partial reboiler, which acts as an equilibrium contact, and a total condenser. The distillate and reflux are saturated liquids. Find \(B\) and \(D\) in \(\mathrm{kg} / \mathrm{h}\), and find \(Q_{c}\) and \(Q_{R}\) in \(\mathrm{kcal} / \mathrm{h}\). Use data in Figure 2-4.

a. External reflux ratio, \(\mathrm{L}_{0} / \mathrm{D}=3.0\) (mass units).
b. Boilup ratio, \(v / \mathrm{B}=2.5\) (mass units).

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