2.2 - Definition of Mass Transfer Coefficients
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Practice Questions
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What does the mass transfer coefficient represent?
💡 Hint: Think of it as a speed measurement for molecules moving between phases.
What are the two phases typically involved in mass transfer problems?
💡 Hint: Consider common examples of phase interactions.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a mass transfer coefficient?
💡 Hint: It's related to how substances diffuse.
Henry's Law relates gas solubility to what?
💡 Hint: Think about how gases interact with their liquids.
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Challenge Problems
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Consider a lake where the concentration of a pollutant is measured to be 15 mg/L. The ambient air has a concentration of 0.2 mg/L. If the mass transfer coefficient for water is estimated to be 2.5 m/s and for air is 0.5 m/s, calculate the flux of the pollutant across the air-water interface.
💡 Hint: Identify the interface concentrations using the known bulk values.
In a chemical reactor, gas and liquid phases are reacting. You find the individual mass transfer coefficients as 1.2 m/s and 0.8 m/s respectively. The total equivalent resistance is 100. What is the implication for the rate of mass transfer and what changes would improve efficiency?
💡 Hint: Determine which phase needs adjustments to optimize mass transfer rates.
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