3. McCabe, problem 1.5: Dry gas containing 75% air and 25% ammonia vapor enters the bottom of the cylindrical packed absorption tower that is 2 ft in diameter. Nozzles in the

top of the tower distribute water over the packing. A solution of ammonia in water is drawn from the bottom of the column, and scrubbed gas leaves the top. The gas enters at 80°F and 760 mmHg pressure. It leaves at 60°F and 730 mm. The leaving gas contains on the dry basis, 1% ammonia a)If the entering gas flows through the empty bottom of the column at an average velocity (upward) of 1.5 ft/s, how many cubic feet of entering gas are treated per hour? B) How many pounds of ammonia are absorbed per hour?