A stripping column with 27 actual stages has an overall efficiency of 0.2 . Feed is \(100.0 \mathrm{kmol} / \mathrm{h}\) of liquid water that contains \(0.010 \mathrm{~mol}^{\%} \mathrm{CHCl}_{3}\). Stripping gas is pure nitrogen saturated with water vapor. Remove \(95.0 \%\) of \(\mathrm{CHCl}_{3}\) from the water. Operation is at \(0.5 \mathrm{~atm}\) and \(25.0^{\circ} \mathrm{C}\).

a. What is the mole fraction \(\mathrm{CHCl}_{3}\) in the outlet liquid?

b. What is the vapor flow rate \(\mathrm{V}\) in \(\mathrm{kmol} / \mathrm{h}\) ?

c. What is the mole fraction \(\mathrm{CHCl}_{3}\) in the outlet vapor?

d. What would the minimum vapor flow rate be if a large number of additional stages were added?