A student is interested in separating 10 gmol of a mixture of 30mol% ethanol and water in a laboratory distillation apparatus. He loads a round-bottom flask with a liquid ethanol-water mixture. The flask has a long neck with a side-arm. He connects one end of a long tube to the side-arm and then positions the other end of the tube over a beaker. He wraps ice around the long tube. Then he places the round-bottom flask on top of a heating mantle and begins the distillation process. As the solution in the flask is heated, vapor escapes through the tube, condenses, and collects in the beaker. The vapor flow rate is held constant at 0.25gmol/min. The mole fraction ethanol in the vapor and the liquid are related as yE=1.2xE. Explain whether this separation is an example of continuous-flow steady-state, semibatch, or batch. Using the liquid in the flask as the system, write a differential material balance equation on ethanol and also on total moles in the system. Calculate the gmol liquid remaining in the flask as well as the mole fraction ethanol in the liauid after 20 minutes