Fick's Law of Diffusion, Concentration Gradient, Physics Problems

This physics video tutorial provides a basic introduction into fick's law of diffusion. It explains how to calculate the diffusion flow rate in a pipe between a region of high concentration and a region of low concentration given the diffusion constant. This tutorial explains how to calculate the concentration gradient and how to use it to estimate the concentration at a point in the pipe. This video contains plenty of examples and practice problems.
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[@TheOrganicChemistryTutor]

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[@cyrineabidi866]

how can your explanations be this simple! thank you so much

[@edmondgoskolli2960]

Very nice explanation . Thank you

[@AbhishekKumar-ry9ls]

Amazing Short and simple ❤ thanks for the lucid explanation

[@parkerdunn5270]

Wow thank you very much. made this super easy.

[@anoopak2839]

Can u estimate the diffussive flux when there is also a bulk flow inside the tube ?

[@opticaideal]

Amazing! Thanks!

[@annikaj8021]

At 6:59 units of tube's length (10 metres) are supposed to be in metres and not cubic metres

[@user-mu9nj8rl3l]

Nice!

[@islamicbrotherhood9574]

Thanks....

[@djelilkamel2581]

thank you sir

[@alexwander1992]

Thanks

[@jithinajith4295]

Which textbook is this?

[@IamKudos]

okay so does diffusion flow rate have two equations?

[@aqeelraja4750]

it doesnt. one is for the concentration gradient which is then plugged into ficks first law equation.

[@ameersyed3002]

Can Ficks law be applied to hair? there are layers to hair but im not sure if there is any diffusion.

[@JustinG1057]

I guess you could compare in vitro results to calculations and see!

[@ameersyed3002]

@@JustinG1057 yeah we have a TEWL meter for skin at work that uses this law and used it on hair but were not sure what the results meant. I guess I could try and do some calculations. Math is not my strong suit tho lol

[@joanpinol3253]

Really interesting! I would like to ask you how can I calculate the final concentration in gas phase if I don’t know the Flux J and the final. I am trying to calculate the concentration of VOC compound in gas phase in function of concentration in water

[@user-tx4hh2bj4k]

💙

[@gerbilman9948]

hello, I think you did not balance the units correctly, when you say J=kg/s it really should be kg/m^2*s instead. The concentration delta over the length becomes kg/m^2 not kg alone. This leads to the mass of oxygen flowing through the tube to be incorrect also, because its actually 2.895e-6 kg/m^2*s, and the cross sectional area needs to be considered.

[@halidabdurahmanovic1129]

C

[@jaromatt3747]

Boss

[@islamicbrotherhood9574]

Plz take it to a more difficult level....yes u can plz.... Involve some calculas also.... Integration etc

[@wirawanciptonugroho3611]

It is a good explanation but it is oversimplified. The diffusion process is not linear because the concentration at L=0 and L=L changes with time. So the flux (rate of diffusion) gets smaller and smaller.. So in order to get a concentration profile along the diffusional distance over time then you should use the 2nd Fick's law.

[@AB-gu9ui]

If you know so much then why are you watching this video, This isn't meant to be a complicated explanation. I just started learning this topic and it was perfect for me

[@JustinG1057]

It's oversimplified because it's algebra and not calculus, bud. Remember that the goal of this is to that confused people can grasp the concepts that they are learning in class, not to research about the flow rate of oxygen in real life.

[@Pakhavar]

Really appreciate your concern.. But seriously, it helped me a lot even in3rd year of my PhD... as this is not really my field..

[@gian8251]

bud im just trying to pass my class not apply this to real life