A large tank (860 liters) is used as a gas-liquid contactor. Gas bubbles up through the vessel and out the top, liquid flows in at one part and out the other at 5 liters/s. To get an idea of the flow pattern of liquid in this tank a pulse of tracer 150 gm) is injected at the liquid inlet and measured at the outlet, as shown in Fig. E11.2a. (M = (a) Is this a properly done experiment? (b) If so, find the liquid fraction in the vessel. (c) Determine the E curve for the liquid. (d) Qualitatively what do you think is happening in the vessel? 0.75 Area, A₁ = 0.375 284 C, gm/liter A1 Area 4 A1 Area A1 16 Area = 64 etc. 2 4 6 8 t, min