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One thousand kilograms per hour of a mixture of benzene (B) and toluene(T) that contains 50% benzene by mass are seperated by distillation into two fractions. The mass flow rate of benzene in the top stream is 450 kg B/h, and that of toluene in the bottom stream is 475 kg T/h. The operation is at steady state. Write balances on benzene and toluene to calculate the unknown component flow rates in the output streams. Fbottoms, total = Fbottoms, benzene + Fbottoms, toluene Fbottoms, total = 50 + 475 Fbottoms, total = 525 kg/h.
Now we have a few choices, we can write either Ftotal = Foverhead + Fbottoms or Ftotal, toluene = Foverhead, toluene + Fbottoms,toluene Where should we click next to use the top equation? |
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