Ammonia gas is being absorbed by water in a wetted-wall column.  At one level of the column, the following data applies:

gas-phase mass transfer coefficient: 5.22 x 10^-9 kmol m^-2 s^-1 Pa^-1

liquid-phase mass transfer coefficient: 3.88 x10^-5 m s^-1

Henry's constant: 0.955 kPa (kmol m^-3)^-1

mole fraction of ammonia in liquid: 1.351 x 10^-3

mole fraction of ammonia in gas: 0.065

total pressure of system: 1.013 bar

mole mass of ammonia: 17

Find:

• the mass transfer flux in column
• the partial pressure of the ammonia gas at the gas/liquid interface
• the molar concentration of the ammonia in the liquid at the interface