Practice Mass Transfer Resistance (2.5) - Interphase Mass Transfer – Boundary Layer and Mass Transfer Coefficient

Practice: Mass Transfer Resistance

Lesson 2.5Interphase Mass Transfer – Boundary Layer and Mass Transfer Coefficient

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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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6 sample questions

Question 1.
What does the term mass transfer resistance refer to?
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Think about obstacles to mass movement.
Question 2.
Define the concentration gradient.
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What drives the mass transfer?
3Question 3.
What is mass transfer resistance mainly attributed to?
- Temperature changes
- Fluid characteristics
- Pressure differences
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Think about what properties affect flow.
4Question 4.
True or False: An increased boundary layer thickness decreases mass transfer efficiency.
- True
- False
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What happens when spaces are filled?
Question 5.
You have a container with air over a water surface. If an oil slick surfaces and spreads, how does this affect the mass transfer resistance in terms of both convection and diffusion?
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Consider how each layer (air, oil, water) interacts.
Question 6.
In an experiment, increasing the flow velocity of water increases the mass transfer coefficient while also increasing the boundary layer thickness. Explain this contradictory situation.
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Think about how flows interact and create layers.

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