Practice Environmental Quality: Monitoring And Analysis (1) - Interphase Mass Transfer – Flux and Mass Transfer Resistance

Practice: Environmental Quality: Monitoring and Analysis

Lesson 1Interphase 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.
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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 state about the movement of substances?
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Think about how pollutants spread in water.
Question 2.
Name one factor that affects the diffusion coefficient.
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Is it easier to move in water or air?
3Question 3.
What does Fick’s Law describe?
- Movement of particles from high to low concentration
- Movement of particles against concentration
- Random movement of particles
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Think about how pollutants spread in streams.
4Question 4.
The diffusion coefficient is inversely related to which of the following?
- Molecular size
- Temperature
- Concentration gradient
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Larger size generally leads to slower diffusion.
Question 5.
Consider a pollutant leaking into a lake. If the diffusion coefficient of this pollutant in water is known, how could you estimate its concentration over time?
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What equations relate to the concentration gradient here?
Question 6.
If two substances differ significantly in molecular weight, how would this affect their respective diffusion coefficients in air?
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Remember how molecular weight relates to diffusion rates.

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