Practice Resistance in Mass Transfer - 2.2 | 1. Air-Water Exchange | Environmental Quality Monitoring & Analysis, - Vol 5
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Knowledge

2.2 - Resistance in Mass Transfer

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Define mass transfer resistance in your own words.

💡 Hint: Think about the factors affecting pollutant transfer.

Question 2

Easy

What is mixing height?

💡 Hint: Relate it to how pollutants would behave once released.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does mass transfer resistance refer to?

  • A barrier to energy transfer
  • A barrier to pollutant transfer
  • A type of fluid mechanics

💡 Hint: Think about what limits pollutant exchange.

Question 2

True or False: Higher mixing heights generally result in lower pollutant concentrations at ground level.

  • True
  • False

💡 Hint: Consider how pollutants spread with height.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A pollutant is released into a lake. After one hour, its concentration is measured at 300 mg/L in the water. If the evaporation rate is 10 mg/L per hour, calculate the rate of accumulation and prepare the mass balance equation.

💡 Hint: Remember to identify all terms in the mass balance equation.

Question 2

Consider a scenario where pollutant x evaporates from a still lake surface at a concentration of 200 mg/L. If the ambient air concentration is zero, and kA2 = 0.25 m/s, calculate the flux and explain its implications.

💡 Hint: Identify concentration gradients as driving forces for mass transfer.

Challenge and get performance evaluation