Practice Interfacial Mass Transfer (3.3) - Interphase Mass Transfer – Flux and Mass Transfer Resistance

Practice: Interfacial Mass Transfer

Lesson 3.3Interphase Mass Transfer – Flux and Mass Transfer Resistance

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does Fick's Law of Diffusion describe?
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Think about the direction of flow regarding concentration.
Question 2.
Name one factor that affects mass transfer resistance.
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Consider properties of the medium.
3Question 3.
What does Fick's Law of Diffusion indicate about substance movement?
- It moves from low to high concentration
- It moves from high to low concentration
- It moves randomly
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Remember the direction of concentration gradients.
4Question 4.
Does a higher molecular weight lead to higher mass transfer resistance?
- True
- False
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Think about how size affects mobility.
Question 5.
Calculate the rate of diffusion for a substance given its concentration gradient of 5 mol/m³ over a distance of 2 meters, using a diffusion coefficient of 0.1 m²/s.
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Remember the negative sign indicates direction.
Question 6.
A river has been found contaminated by a pollutant with mass transfer into water from sediment influenced by a concentration gradient of 3 mmol/L. If the sediment concentration is 12 mmol/L, how would you set up your mass balance equation?
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Think what trends in concentrations might affect your calculations.

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