(a) Using a mass balance for salt on each tank, set up a system of differential equations to describe the salt concentration in each tank (cA(t), cB(t), cc(t)) as a function of time. Also state the initial conditions needed to find a unique solution. (b) Without solving, predict limiting values of c4(t), cB(t), and cc(t) ast → o.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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6. Tanks A, B, and C (of volumes VẠ, VB, and Vc, respectively) containing a salt solution (initial
mass concentrations cA.0, CB,0, and cc.o) are connected by pipes in that order. Pure water
flows into tank A at a volumetric rate r; liquid flows from A to B, from B to C, and from C
to waste at rate r.
(a) Using a mass balance for salt on each tank, set up a system of differential equations to
describe the salt concentration in each tank (cA(t), cB(t), cc(t)) as a function of time.
Also state the initial conditions needed to find a unique solution.
(b) Without solving, predict limiting values of ca(t), câ(t), and cc(t) as t → o.
Transcribed Image Text:6. Tanks A, B, and C (of volumes VẠ, VB, and Vc, respectively) containing a salt solution (initial mass concentrations cA.0, CB,0, and cc.o) are connected by pipes in that order. Pure water flows into tank A at a volumetric rate r; liquid flows from A to B, from B to C, and from C to waste at rate r. (a) Using a mass balance for salt on each tank, set up a system of differential equations to describe the salt concentration in each tank (cA(t), cB(t), cc(t)) as a function of time. Also state the initial conditions needed to find a unique solution. (b) Without solving, predict limiting values of ca(t), câ(t), and cc(t) as t → o.
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