For which of the following unit operations, Lewis number is of significance ?
Correct answer: B. Humidification
- A. Adsorption
- B. Humidification
- C. Gas absorption
- D. Binary distillation
Explanation
The Lewis number compares thermal diffusivity with mass diffusivity and is important in simultaneous heat and mass transfer. Humidification involves coupled heat and water-vapour transfer, so it is the relevant operation here.
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