Question 3 2 pts (Q3-1) Liquid water at 25C is to be aerated in a bubble column where finely air bubbles with diameter de of 0.5 mm are injected co-currently with the liquid. The bubble column is 2.5 m high with a superficial liquid velocity of 0.25 m/s and a cross-sectional area of 1.8 mThe saturated oxygen concentration is 2.67x10 kmol/m. The mass transfer coefficient for the transfer of oxygen from the liquid interface to the bulk water is 9.8*10 m/s. The diffusivity of oxygen in water is 2.42x109 m/s. The volume fraction of the injected air is 0.25. The oxygen concentration in water is given by C - 2.67x104 - 2.55*10*exp(- 0.062), where z is the distance from the inlet and Cis in kmol/m. At z = 1.2 m, determine the convective molar transfer rate of oxygen in water in kmol/s 1.337x10-5kmol/s 1.537x105kmol/s 1.737x10-5 kmol/s 1.937x105 kmol/s None of the given