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)

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Q. The term activated means _____________

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

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

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Q. The solute movement of fluid on solids are __________

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

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

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

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

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

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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.

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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.

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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.

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Q. Diffusivity of the liquids can be determined by

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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

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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.

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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.

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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.

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Q. __________ energy helps for molecular diffusion.

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Q. For two particles at steady state collision of A and B, J flux of A is 2 mol/sq.m sec, find the J flux of B.

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