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Question 4: A well stirred storage vessel is originally filled with 500 kg of 20 wt % ethanol solution. The operator decided to dilute the solution in the vessel by flowing a 10 wt % ethanol solution at a rate of 1000 kg/h into the vessel and withdrawing the well stirred solution from the vessel at a rate of 500 kg/h. (a) Calculate the time it takes the solution in the vessel to reach a concentration of 15 wt % ethanol. (b) If the vessel can only hold 1500 kg of the solution, calculate the ethanol concentration when the vessel is completely filled. Assume that the density of ethanol solution during the operation remains essentially constant within the ethanol concentration range of operation.

Question 4: A well stirred storage vessel is originally filled with 500 kg of 20 wt % ethanol solution. The operator decided to dilute the solution in the vessel by flowing a 10 wt % ethanol solution at a rate of 1000 kg/h into the vessel and withdrawing the well stirred solution from the vessel at a rate of 500 kg/h. (a) Calculate the time it takes the solution in the vessel to reach a concentration of 15 wt % ethanol. (b) If the vessel can only hold 1500 kg of the solution, calculate the ethanol concentration when the vessel is completely filled. Assume that the density of ethanol solution during the operation remains essentially constant within the ethanol concentration range of operation.

Introduction to Chemical Engineering Thermodynamics
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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Question 4: A well stirred storage vessel is originally filled with 500 kg of 20 wt % ethanol solution. The operator decided to dilute the solution in the vessel by flowing a 10 wt % ethanol solution at a rate of 1000 kg/h into the vessel and withdrawing the well stirred solution from the vessel at a rate of 500 kg/h. (a) Calculate the time it takes the solution in the vessel to reach a concentration of 15 wt % ethanol. (b) If the vessel can only hold 1500 kg of the solution, calculate the ethanol concentration when the vessel is completely filled. Assume that the density of ethanol solution during the operation remains essentially constant within the ethanol concentration range of operation.
Transcribed Image Text:Question 4: A well stirred storage vessel is originally filled with 500 kg of 20 wt % ethanol solution. The operator decided to dilute the solution in the vessel by flowing a 10 wt % ethanol solution at a rate of 1000 kg/h into the vessel and withdrawing the well stirred solution from the vessel at a rate of 500 kg/h. (a) Calculate the time it takes the solution in the vessel to reach a concentration of 15 wt % ethanol. (b) If the vessel can only hold 1500 kg of the solution, calculate the ethanol concentration when the vessel is completely filled. Assume that the density of ethanol solution during the operation remains essentially constant within the ethanol concentration range of operation.
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