1. From the following list, identify the unit operations in which mass transfer phenomena is relevant to do equipment design and dimensioning. (Select as many as necessary) a. Pumps and centrifuges b. Gas absorption and stripping c. Distillation d. Mixing and stirring e. Heterogenous catalytic chemical reactions f. Drying and humidification Two phases and each contain a solute "A" These phases are put in contact and allowed to reach (chemical) equilibrium via mass transfer. The concentration profile of A is shown with bold lines: bulk concentration of A in is lower than bulk concentration of A in . 2. For the system shown, mass transfer of A between the two phases is as follows: a. From bulk of to the interphase/interface and from bulk of to the interphase/interface. b. The two phases are already in equilibrium, i.e. A is not transferred between the phases. c. From phase to . d. From phase to . e. Not enough information is provided to determine the direction (or if) A is transferred. 3. For the system shown, the flux of A(NA) in each phase is as follows: a. NANA c. NA=NA=0 d. NA=NA=0 e. NA=NA f. Not enough information is provided to determine how the flux of A changes