4.2.2 - Internal Porosity and Complications in Diffusion
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is the effective diffusivity and why is it important?
💡 Hint: Think about how solids affect diffusion.
Explain what porosity means in the context of diffusion.
💡 Hint: Consider how space in materials helps fluid movement.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does effective diffusivity refer to?
💡 Hint: Think about how solids change the path of diffusion.
True or False: The local equilibrium assumption implies that diffusion and adsorption rates are different.
💡 Hint: Are diffusion and adsorption happening at the same speed?
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Given a scenario of a pollutant spreading in a sandy soil with high porosity, calculate the expected time for diffusion considering effective diffusivity. Assume DA3 = 0.045 m²/s.
💡 Hint: Consider time = distance² / (2 * DA3) for estimating.
In a site with significant heavy metal adsorption onto soil particles, evaluate how this might change diffusion rates compared to a clean sandy substrate.
💡 Hint: Examine how adsorption directly affects the movement of contaminants.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.