Binary distillation involves the mass transfer by ______________________ at the gas-liquid interface?
Correct answer: D. A counter diffusion at an almost equal molar rate
- A. Unidirectional diffusion from liquid to gas phase
- B. Unidirectional diffusion from gas to liquid phase
- C. Either A. or B.
- D. A counter diffusion at an almost equal molar rate
Explanation
In binary distillation, both components diffuse across the gas-liquid interface in opposite directions. For equimolar counterdiffusion, their molar diffusion rates are approximately equal, making option D correct.
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