Q. Find the diffusivity through slab if N flux of A 4 mol/sq.m sec, concentration difference is 2mol/cu.m and distance is 3 m.

View solution

Q. Find the activated diffusivity of carbon if energy of activation is 6 kJ; the value of constant diffusivity is 2.5 sq.m/sec. (Hint: the value of exponential of (-6/RT) is 2.55)

View solution

Q. The term activated means _____________

View solution

Q. If the two gases are separated by a polymer membrane, the extent of diffusion depends on _______ law.

View solution

Q. For permanent gases diffusivity the order is _________ sq.m/s

View solution

Q. The solute movement of fluid on solids are __________

View solution

Q. If the pore of the solid is inaccessible to external fluids then it is known as dead end.

View solution

Q. Macroporic surrounding of microscopic pellets powders of different magnitude in size is _______

View solution

Q. Find the permeability if diffusivity is 2 units and solubility coefficient is 5 units assume all are in SI units.

View solution

Q. Before collision, the distance between the two particles is mean free path.

View solution

Q. Diffusion co-efficient in molecular diffusion is estimated by _________

View solution

Q. Find the total flux for a particle A and B in a steady state if flux of A and B is 2.44 and 4.44 mol/sq.m sec.

View solution

Q. Find the flux of A ( xA= 0.2) if Total flux is 5 mol/sq.m sec and J flux of A is 2 mol/sq.m sec.

View solution

Q. Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec.

View solution

Q. Diffusivity of the liquids can be determined by

View solution

Q. For the molecular diffusion of liquids, if the diffusing molecules having criteria of steady state diffusion of B over non diffusing A then the N flux of A is

View solution

Q. For liquid molecular diffusion of A and B, steady state equimolar counter diffusion the N flux of A is negative of N flux of B.

View solution

Q. Find the change in concentration for a steady state equimolar counter diffusion if D(AB)= 6 sq.m/sec, the change in distance is 2 m and the N flux of A is 5 mol/sq.m sec.

View solution

Q. Find the diffusivity of AB in sq.m/sec if N flux of A 5 mol/sq.m sec, concentration difference is 2mol/cu.m and distance is 3 m.

View solution

Q. __________ energy helps for molecular diffusion.

View solution