1. Ammonia is absorbed in water from a mixture with air using a column operating at
atmospheric pressure and 295 K. The resistance to transfer can be regarded as lying entirely in
a gas film 1 mm thick. At a point in the column the partial pressure of the ammonia is 6.6
kN/m².
a) What is the transfer rate per unit area at that point in the column?
b)If the gas was compressed to 200 kN/m² pressure, how would the transfer rate will be
altered? (40p).