1. An aqueous solution containing 3mol% ethanol is separated in a distillation column at 1atm into a distillate which is 61mol% ethanol and a bottoms which is 0.01mol% ethanol. This separation uses 3.5kg of saturated 0.2MPa steam per kmol of feed, and you should assume all of the energy used in the process comes from the condensation of steam in the reboiler. Compute the thermodynamic efficiency of the process. Useful information: This process can be considered to include three steps: An expression for the minimum work for these steps is Ws=RTnilnpiPi=RTnilna^i And the activity coefficients you need are E(xE=0.03)=3.67E(xE=0.61)=1.08E=4.05W(xE=0.61)=1.82