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Running head: Homework problems
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Homework problems:
Student’s name:
Institution affiliation:
Date:
Homework problems
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Q1 a) Wall flux, n”A,W = k (C͚ - C)
But from the question, n”A,W = 2.5 * 10-9 mol/s-m2
Assuming k = 2.5 * 10-11 m/s
It implies that, 2.5 * 10-9 = 2.5 * 10-11(100 – C)
100 – C = (2.5 * 10-9)/ (2.5 * 10-11)
100 – C = 100
Hence, C = 0
This means that concentration outside the tube is zero.
Advective flux, n’= VC
Where V is the velocity & C is concentration.
It implies that n’= (2.0 * 10-8) * 100
= 2.0 * 10-6 mol/s-m2
𝑑𝐶
Diffusive flux, n”diff = -DAB(...