How would you expect the liquid output flow rate to vary with time? A.)The liquid flow rate should start out equal to the feed flow rate and then decrease to one third of the molar feed flow rate. B.)The liquid flow rate should start out at zero and gradually increase to one third of the molar feed flow rate. C.)The liquid flow rate should start equal to the molar feed flow rate and decrease to zero. D.)The liquid flow rate should start out at zero and then oscillate about a value close to one third of the molar feed flow rate. E.)The lqiuid flow rate should start out at two thirds of the molar feed flow rate and remain constant at that rate.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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How would you expect the liquid output flow rate to vary with time? A.)The liquid flow rate should start out equal to the feed flow rate and then decrease to one third of the molar feed flow rate. B.)The liquid flow rate should start out at zero and gradually increase to one third of the molar feed flow rate. C.)The liquid flow rate should start equal to the molar feed flow rate and decrease to zero. D.)The liquid flow rate should start out at zero and then oscillate about a value close to one third of the molar feed flow rate. E.)The lqiuid flow rate should start out at two thirds of the molar feed flow rate and remain constant at that rate.
A stream consisting of 31.7 mole% benzene (B)
and 68.3% toluene (T) is fed at a constant rate to a
process unit that produces two product streams,
one a vapor and the other a liquid.
The vapor flow rate is initially zero and
asymptotically approaches two thirds of the molar
flow rate of the feed stream. Throughout this
entire period, no material accumulates in the unit.
When the vapor flow rate has become constant,
the liquid is analyzed and found to be 25.7 mole%
benzene.
Transcribed Image Text:A stream consisting of 31.7 mole% benzene (B) and 68.3% toluene (T) is fed at a constant rate to a process unit that produces two product streams, one a vapor and the other a liquid. The vapor flow rate is initially zero and asymptotically approaches two thirds of the molar flow rate of the feed stream. Throughout this entire period, no material accumulates in the unit. When the vapor flow rate has become constant, the liquid is analyzed and found to be 25.7 mole% benzene.
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