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If Ω << 1, then _________

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If Ω << 1, then _________

(a) CAS = CAb

(b) CAS < CAb

(c) CAS > CAb

(d) CAS = CAb = 0

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This interesting question is from External Mass Transfer topic in chapter Heterogenous Reactions of Bioprocess Engineering

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The correct option is (a) CAS = CAb

To elaborate: Ω is an observable modulus for external mass transfer. If Ω << 1, CAS = CAb and external mass-transfer effects are insignificant. Otherwise, CAS < CAb and external mass-transfer effects are significant.

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