تم الحل ✓
categoryهندسة كيميائية
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
(1 point)
0. Let
The flow system shown in the figure is activated at time t =
Qi(t) denote the amount of solute present in the ith tank at time t.
Assume that all the flow rates are a constant 10 L/min. It follows that
the volume of solution in each tank remains constant; assume this volume
to be 1000 L. The concentration of solute in the inflow to Tank 1 (from a
source other than Tank 2) is 0.2 kg/L, and the concentration of solute
in the inflow to Tank 2 (from a source other than Tank 1) is 0 kg/L.
Assume each tank is mixed perfectly.
a. Set up a system of first-order differential equations that models this situation.
Qi
-1/50
1/100
Q1
2
+
Q₂
1/100
-1/50
Q2
0
b. If Q1 (0) = 30 kg and Q2(0) = 0 kg, find the amount of solute in each
tank after t minutes.
Q1(t)=(55/3)e^(-3/100)t+(-85)e^(-1/100)t+(400/3)
Q2(t)=(55/3)e^(-3/100)+(-85)e^(-1/100)+(200/3)
c. Ast∞, how much solute is in each tank?
In the long run, Tank 1 will have 400/3
In the long run, Tank 2 will have 200/3
kg of solute.
kg of solute.
(Reread the question and think about why this answer makes sense.)
kg
kg
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