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Unformatted text preview: m /min for 2 minutes and then the pouring stops. Assume that each tank is perfectly mixed. OVER a) How can you express the salt pouring process as a function of time? Think about the “pulse” function we used in class. b) Set up mass balances for each tank and find the salt concentration in each tank for all times using Laplace transforms and Mathematica. Define the amount of salt in tank #1 as x(t) and tank #2 as y(t). Attach your Mathematica work and highlight x(t) and y(t) on your printout. c) Plot x(t) and y(t) for the time domain [0, 200] minutes. d) How long does it take for the tanks to reach steadystate (just estimate it from your plots)? e) What is the salt concentration at steady state in each tank? f) Comment on how Laplace transforms might be useful in a chemical plant....
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 Fall '08
 Gordon,M
 Chemical Engineering, Thermodynamics, Steady State, Tank, salt concentration

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