Practice Environmental Quality: Monitoring And Analysis (1) - Interphase Mass Transfer – Individual and Overall Mass Transfer Coefficients

Practice: Environmental Quality: Monitoring and Analysis

Lesson 1Interphase Mass Transfer – Individual and Overall Mass Transfer Coefficients

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10 questions

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5 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.
Define 'interface' in relation to mass transfer.
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Think about where two different states of matter meet.
Question 2.
What happens to the concentration gradient when water is stirred?
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What does stirring do to the distribution of substances?
3Question 3.
What is the primary resistance to mass transfer at an interface?
- Friction
- Velocity
- Concentration Gradient
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Think about what slows down the movement of particles across phases.
4Question 4.
A steady state implies which of the following?
- True
- False
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Consider if rates in and out can ever be balanced.
Question 5.
Consider a lake with a surface exposed to wind. Describe how the mixing conditions affect the concentration gradients and enumerate the resulting effects on mass transfer rates.
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Evaluate how external factors change mixing dynamics.
Question 6.
How would you apply Fick's laws of diffusion to derive an equation for mass transfer across the air-water interface? Include the factors affecting the coefficients.
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Consider the significance of diffusion coefficients.

6 more questions in this section. Enroll free to practise them all.