Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in

Related MCQs

• Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.
• The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
• The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of
• If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is
• Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2 .s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is:
• Acetic acid will be most economically separated from a dilute solution of acetic acid in water by
• Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are:
• The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by
• The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is
• Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)