The isothermal first-order reaction of gaseous a occurs


The isothermal, first-order reaction of gaseous A occurs within the pores of a spherical catalyst pellet. The reactant concentration halfway between the external surface and the center of the pellet is equal to one-fourth the concentration at the external surface.

(a) What is the relative concentration of A near the center of the pellet?

(b) By what fraction should the pellet diameter be reduced to give an effectiveness factor of 0.7?

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Mechanical Engineering: The isothermal first-order reaction of gaseous a occurs
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