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Homework Statement
Two boxes of volume V sharing a common wall with a hole of ΔA. Both boxes have gas at T. At t =0s there are N1(0) at one box at time t and N2(0) particles in the other box.The particles from box 1 leak into box 2 through the hole and vice versa.
a. obtain two differential equations, one for N1(t) and one for N2(t).
b. Solve them for N1(t) and N2(t). Particles are not created or destroyed : N1(t) + N2(t) = N1(0) + N2(0)
c. Find pressure of box 1 as function of time and show that it goes to the average value as t goes to infinity.
Homework Equations
P = 2N/3V * 1/2 <mv^2>
The Attempt at a Solution
Φ = nu/4
Flux * Area = Rate
Rate = Anu/4
-dN1/dt = ANu/V4
N1(t) = N1(0)exp(-ΔAut/4V) (negative since rate out)
and N2(t)=N2(0)exp(ΔAut/4V) (positive since I chose rate in for here)
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