$($GATE $1999)$ Stripping of ammonia is carried out at a pressure of $1\mathrm{.}1$

atm. One $m^3$ of water enters the system and the ratio of the molar flow rate

of air and that of the water is $4.$ The inlet air and the inlet water have $0\mathrm{.}1$

and $1\mathrm{.}0$ mole percent of ammonia respectively. The Murphee vapour plate

efficiency for ammonia removal is $50\%$ and the Henry's law constant for

ammonia in water is $2\mathrm{.}574{10}^{-5}$ atm. $\frac{m^3}{m}ol.$ Determine the exit water

composition and the exit air composition.