CO₂ is to be stripped from water at 20°C and 2 atm using a staged, countercurrent stripper. The liquid flowrate is 100 kmol/h of water with an initial mole fraction of CO₂ of 0.00005. The inlet air stream contains no CO₂. A 98.4% removal of CO₂ from the water is desired. The Henry’s law constant for CO₂ in water at 20°C is 1420 atm.

1. Calculate the outlet mole fraction of CO₂ in water.

2. If there are seven equilibrium stages, calculate V and the outlet mole fraction of CO₂ in the air.