Homework11+rev2

Homework11+rev2 - Chemical Engineering 142 Homework Set #11...

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Chemical Engineering 142 Homework Set #11 100 points total Due Wednesday April 21, 2010 Problem 1 (35 points) The irreversible reaction, A B, is taking place in the porous catalyst slab shown in the figure below. The reaction is zero order in A. (a) Show that the concentration profile using the symmetry B.C. is g G g = 1 + ² ³ ´ µ¶ · ¸ ¹ ´ − 1º Where ² ³ ´ = »¸ ´ ½ g (b) For a Thiele modulus of 1.0, at what point in the slab is the concentration zero? For ² ³ = 4 ? (c) What is the concentration you calculate at z = 0.1 L. and ² ³ = 10 using the equation above? What do you conclude about using that equation? (d) Plot the dimensionless concentration Ψ = ¾ ¿ ¾ ¿À as a function of Á =  à for ² ³ = 0.25, 0.5, 1 Problem 2 (30 points) The swimming rate of a small organism is related to the energy released by hydrolysis of ATP to ADP. The rate of hydrolysis is equal to the rate of diffusion of ATP from the midpiece to the tail. The diffusion coefficient of ATP in the midsection and tail
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This note was uploaded on 01/23/2011 for the course CHM 142 taught by Professor Hey during the Spring '10 term at Berkeley.

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Homework11+rev2 - Chemical Engineering 142 Homework Set #11...

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