Which of the following is not a unit of mass transfer co-efficient ?
Correct answer: A. None of these
- A. None of these
- B. Moles transferred/ [(time) (area) (mass A/mass B)]
- C. Moles transferred/ [(time) (area) (pressure)]
- D. Moles transferred/ [(time) (area) (mole fraction)]
Explanation
A mass-transfer coefficient has units of molar flux divided by a concentration, mole-fraction, mass-ratio, or pressure driving force. All three listed forms are therefore valid units, making “none of these” the appropriate choice.
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