Stripping #1 Ammonia is stripped from a dilute aqueous solution by countercurrent contact with air in a column containing seven sieve trays. The equilibrium relationship is ye = 0.85 xe, and when the molar flow of air is 1.5 times that of the solution, 92.5% of the ammonia is removed. (a) How many ideal stages does the column have and what is the stage efficiency? (b) Under what thermodynamic conditions temperature, pressure) is the column operating? [Discuss)