A feed containing equimolar amount of methanol and water is mixed with 15 moles of a 40 mol% aqueous methanol stream. The mixture enters a separation unit that creates two streams. A top stream exits that contains 65 mol% methanol and the rest water. The other stream, which is 70 moles, enters a second separation unit. A top stream exits the second unit as a 50% methanol/50% water mixture. The other stream is unknown. If the fresh feed to the system is 100 moles (the equimolar mixture) and the two top streams exiting the separation units have the same flow rate, find the mass flow rate and composition of the other stream exiting the second separation unit.
A feed containing equimolar amount of methanol and water is mixed with 15 moles of a 40 mol% aqueous methanol stream. The mixture enters a separation unit that creates two streams. A top stream exits that contains 65 mol% methanol and the rest water. The other stream, which is 70 moles, enters a second separation unit. A top stream exits the second unit as a 50% methanol/50% water mixture. The other stream is unknown. If the fresh feed to the system is 100 moles (the equimolar mixture) and the two top streams exiting the separation units have the same flow rate, find the mass flow rate and composition of the other stream exiting the second separation unit.
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
Section: Chapter Questions
Problem 1.1P
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Q3)
A feed containing equimolar amount of methanol and water is mixed with 15 moles
of a 40 mol% aqueous methanol stream. The mixture enters a separation unit that
creates two streams. A top stream exits that contains 65 mol% methanol and the
rest water. The other stream, which is 70 moles, enters a second separation unit. A
top stream exits the second unit as a 50% methanol/50% water mixture. The other
stream is unknown. If the fresh feed to the system is 100 moles (the equimolar
mixture) and the two top streams exiting the separation units have the same flow
rate, find the mass flow rate and composition of the other stream exiting the second
separation unit.
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Transcribed Image Text:10:33 1
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Remaining Time: 2 hours, 59 minutes, 46
seconds.
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1
Q1)
Two streams enter a column. Stream 1 is 40 % A, the rest B. Stream 2 is 30 % A, and
the rest C. two streams exit the column. The first is 100% A while the second is 20%
B, 5% A, and the rest C. Write the mass balance for this system and solve the
unknown variables if you assume all in mass fraction.
Q2)
A liquid-liquid extraction vessel is used to separate a solute (S) from water (W). The
solute is transferred to an organic solvent (0) that is immiscible in water. Given the
process diagram below, calculate the following:
A) The organic solvent required to produce a water product containing 0.9%
solute
B) The fraction of the solute in the feed that is recovered in the organic solvent
product
mų = 100 kg/hr.
m3 = 225 kg/hr.
Xs3 Kg S/kg
x03 Kg W/kg
Xs1 = 0.14 kg S/kg
mą Kg/hr.
m, = Kg/hr
x02= 1.0 kg 0/kg
Xs3 = 0.009 kg S/kg
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