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and stripping pre (b) In gas-liquid mass transfer, briefly discuss the effect of the slope of the equilibrium line on the liquid phase controlled system. (c) NH3 gas (A) is to be removed from an inert gas in absorption tower. The gas enters the tower at a rate of 200kgmol/h and contains 25 mole %NH3. The solvent (B) enters the tower at rate of 800kgmole/h and is initially free of NH3. The exiting liquid stream contains 5 mole %NH3. The equilibrium relationstip is yA=4xA. Determine: i. The concentration of the exiting gas stream. ii. The minimum absorbent flow rate. iv. If the solvent contains 0.5 mole %NH3 was used as the entering liquid, what you expect to the iii. The number of stages. required number of plates? v. Discuss the effect of the minimum liquid flowrate on the number of stages