Practice Interphase Mass Transfer – Flux And Mass Transfer Resistance (1.2) - Interphase Mass Transfer – Flux and Mass Transfer Resistance

Practice: Interphase Mass Transfer – Flux and Mass Transfer Resistance

Lesson 1.2Interphase 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 is flux in the context of mass transfer?
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Think about what quantity represents movement across an area.
Question 2.
Define Fick's law of diffusion in simple terms.
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Focus on the relationship between mass and concentration.
3Question 3.
What does Fick's law state?
- Flux is unrelated to concentration
- Flux is proportional to concentration gradient
- Flux only applies to gases
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Remember: Higher concentration differences mean greater flux.
4Question 4.
True or False: Higher viscosity decreases mass transfer resistance.
- True
- False
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Think about how thick fluids behave.
Question 5.
A river polluted by sewage shows a concentration of pollutant A at 5 mg/L. By applying the mass balance concept, how would you calculate the concentration at a downstream point 100m away if the mass transfer from sediments is estimated at 2 mg/L?
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Use the concept of mass balance for transfer rates.
Question 6.
Given that the diffusion coefficient of a substance is known to be 0.5 cm^2/s in water, calculate the flux if the concentration difference is 10 mg/m^3 over a distance of 0.1m.
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Remember to apply the negative sign for flux directionality.

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