Practice Mass Transfer Resistance (2.3) - Overall Mass Transfer Coefficient

Practice: Mass Transfer Resistance

Lesson 2.3Overall Mass Transfer Coefficient

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8 questions

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

Question 1.
What is mass transfer coefficient?
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Think about how substances travel from one phase to another.
Question 2.
What does flux represent?
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Recall the definition of flux in terms of area.
3Question 3.
What is the relationship between mass transfer coefficients and flux?
- They are directly proportional
- They have no relationship
- They are inversely proportional
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Think about their definitions.
4Question 4.
Is it true that the overall mass transfer rate is influenced by the phase with the highest resistance?
- True
- False
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Reflect on the previous conversations we had about resistances.
Question 5.
If k1 = 0.1 and k2 = 0.9, and the interface concentrations are 5 M for liquid and 0.5 M for gas, calculate the flux.
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Ensure you use the correct coefficients for each phase.
Question 6.
A polluted river has a concentration of 12 ppm and the air above has 2 ppm. If you find that the gas resistance is negligible, calculate the overall resistance impacting the transfer rate.
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Assess the given data against the relationships discussed.

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