Practice Molecular Diffusion (2.1) - Interphase Mass Transfer – Application to Environmental Interfaces

Practice: Molecular Diffusion

Lesson 2.1Interphase Mass Transfer – Application to Environmental Interfaces

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define molecular diffusion.
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Think about concentration gradients.
Question 2.
What does bulk flow refer to?
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Consider what happens when water flows.
3Question 3.
What is molecular diffusion?
- Movement due to temperature differences
- Movement from high to low concentration
- Movement due to external forces
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Focus on what drives the movement.
4Question 4.
True or False: Diffusion stops occurring at equilibrium.
- True
- False
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Think about what equilibrium means.
Question 5.
A chemical is released into a deep lake with no wind. Describe how the pollutant will spread over time and the mechanisms involved.
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Consider the effects of water movement on diffusion.
Question 6.
In groundwater with slow movement, pollutants are tracked from a source to a well. Explain how molecular diffusion plays a role in this scenario.
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Think about the driving factors for mass transport in low flow rates.

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