3. Consider a solute that is diffusing from a gas to liquid phase. As it diffuses through the liquid phase, it reacts with the liquid. The concentration of the solute in the liquid phase at the interface is c1i. At a distance l into the liquid phase, the concentration of the solute goes down to 0 . The reaction taking place is zero-order and shown below: r1=whenc1>0r1=0whenc1=0 (a) What is the mass transfer coefficient if no chemical reaction was taking place? (b) For the case where the zero-order reaction takes place, what is the differential equation and boundary conditions that describe this system? (c) Starting from part (b), calculate the new mass transfer coefficient