If Ω << 1, then _________

Question

If Ω << 1, then _________

(a) CAS = CAb

(b) CAS < CAb

(c) CAS > CAb

(d) CAS = CAb = 0

Answer 1

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.