Problem 1. Reconsider the Butane Pentane column problem. Increase the distillate rate to 50 mol/hr with the same product purity. Maintain the same reflux ratio. Determine the new condenser heat load, the new bottoms product composition, the new internal vapor and liquid rates, and the number of stages required.

Problem 2. Reconsider the Methanol Water Distillation. If the feed stream contains 60 mol % methanol, reevaluate reflux ratio, number of stages required, and the column diameter.

Problem 3. Reconsider the Rectifying column. In this case, no side stream is removed, but all other specifications remain the same except for the bottoms product composition. Determine the bottoms product composition that results for the fixed number of stages.