The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?
Correct answer: B. -q/(1-q)
- A. -q
- B. -q/(1-q)
- C. -q/(q-1)
- D. None of these
Explanation
The q-line equation has slope q/(q-1), which is equal to -q/(1-q). Thus option b represents the usual negative-slope form when q is between zero and one.
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