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Binary mixture of 100 kmol/hr enters into a flash drum has equimolar composition. The distillate obtained is 60 kmol/hr and the enthalpy of distillate, residue and feed are 500 KJ/kmol, 200 KJ/kmol and 400 KJ/kmol. Find the bottom flow rate in kmol/hr.
  • a)
    10
  • b)
    20
  • c)
    30
  • d)
    40
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Binary mixture of 100 kmol/hr enters into a flash drum has equimolar c...
Explanation: -W/D = HD-HF/HW-HF
Where, HD, HW,HF are enthalpy of distillate, residue and feed.
-W/60 = -0.5
W= 30
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Most Upvoted Answer
Binary mixture of 100 kmol/hr enters into a flash drum has equimolar c...
Given data:
- Total flow rate of the binary mixture = 100 kmol/hr
- Equimolar composition of the binary mixture
- Distillate flow rate = 60 kmol/hr
- Enthalpy of distillate = 500 KJ/kmol
- Enthalpy of residue = 200 KJ/kmol
- Enthalpy of feed = 400 KJ/kmol

To find:
- Bottom flow rate in kmol/hr

Let's assume the bottom flow rate as B kmol/hr.

Total flow rate = Distillate flow rate + Bottom flow rate
100 kmol/hr = 60 kmol/hr + B kmol/hr

Therefore, B = 100 kmol/hr - 60 kmol/hr
B = 40 kmol/hr

The bottom flow rate is 40 kmol/hr, which corresponds to option C.
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Binary mixture of 100 kmol/hr enters into a flash drum has equimolar composition. The distillate obtained is 60 kmol/hr and the enthalpy of distillate, residue and feed are 500 KJ/kmol, 200 KJ/kmol and 400 KJ/kmol. Find the bottom flow rate in kmol/hr.a)10b)20c)30d)40Correct answer is option 'C'. Can you explain this answer?
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