Question: (10%) A spherical particle B is surrounded by a gas mixture. The component A diffuses through the gas mixture and reacts with B on the

(10%) A spherical particle B is surrounded by a gas mixture. The component A diffuses through the gas mixture and reacts with B on the surface of particle B according to the following reaction:

A + B-----C+D

Write the flux equation for C in the gas mixture surrounding B , if 0.8 moles of C produced per mole of A consumed. The diffusivity of C in the gas mixture is CMD . Assume the other gases (other than A and C ) in the mixture are non-diffusing.

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