Diffusion: How Molecules Actually Move

Diffusion is a simple description of how molecules move, but at the nanoscale there's more going on. Can the Kinetic Molecular Theory predict where that CO2 molecule will go?
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Teaching topics: Diffusion, kinetic molecular theory, dynamic equilibrium
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[@c1dav1d]

the most underrated science video ever

[@arnaudgaudin4974]

this has to be one of the most brilliant graphical illustration of a complex phenomenon made understandable by a 5 year old. wow!

[@syd4600]

Real

[@syd4600]

@@arnaudgaudin4974Blud what😭😭

[@adityamrai3892]

This is a gem. Thanks man. I am really surprised that I didn't come across this channel before. Thanks for your efforts. Really loved this.

[@bohemiia]

I've always had a really tough time visualizing molecules and chemistry in action. It's mostly reading about it and looking at diagrams. Your videos really helped.

[@jimmywatson7950]

You are a scientist, man. What are you doing I am flattered by the explanations

[@vaishaligurjar8066]

Wow, that was a superb explanation of Diffusion. One of my student was just not able to visualize the Diffusion process. I found this video and after showing it , he ( and of course me too) was glad to understand the process. Simulation too good. Please do post more videos. I am a teacher and your videos will help us in helping the students. Thank you. Have shared the videos with my students.

[@demoncase7]

Dude: AWESOME! I'm now a Houdini student for six months and trying to learn more about physics, science and stuff! I'm so happy to see both things together! Subscribed and thanks!!

[@runekidmose5669]

This is absolutely brilliant! Your channel is extremely underrated for some reasons!? The animation + rendering works perfectly and you are a natural at explaining technical subjects.

[@rusics4098]

I highly appreciate your try to take us out of misconceptions. Because when we read something misconceptions might occur. If it's the topic already studied or researched then books do have to tell us clearly but sometimes they donot. If it's unclear then they are properly researched by scientists. Thank you for this masterpiece!!

[@ladybetto9532]

You deserve so much more subscribers! This video is so detailed and enjoyable!

[@biocinematics]

Thank you! Please consider sharing where you can. The first 10K subscribers are the toughest to find, I think.

[@utsavgoyal7991]

Kindly explain why does osmosis occur as well because if we take water in a container and put a semipermeable membrane in the centre with a difference in concentration of solutes of both sides, what forces water to move to an area of low water concentration which results in a level difference, so how does it manages to defy gravity?

[@biocinematics]

Osmosis is a more complicated and confusing phenomenon. I hope I can make a video on it at some point

[@utsavgoyal7991]

@@biocinematics Oh, Ok thanks for replying and kindly consider making a video on it.

[@nevenhelmy3746]

Did you know ? I’m searching for the answer rn But I think that water with a lower salt concentration moves to water with a higher salt concentration because the salt hinders the movement of water. Therefore, water molecules in the solution with less salt move more efficiently and transfer to the other part.

[@pawelpow]

Why does this channel not have >100k subs? This is a gem, definitely sharing with all my friends

[@PimpMatt0]

Now this a proper explanation. Well done. Sometimes we ignore the physics behind it.

[@mustafaanwar4051]

Thank you so much for this video, your way of explaining was buttery smooth and very intersesting, never felt board once.

[@carbonsoul5121]

earned a subscriber very well put

[@kudimaysey2459]

this shows how the concept of entropy is important. thanks for the excellent visual insight. subscribed ))

[@chrisdemarco9008]

This video was above and beyond helpful in helping me understand the concept better. Stewart, thank you for putting together such an easy to understand and informative video.

[@samsonemor2305]

wow I have found the best scientist .Very fantastic and easy to to understand.I never understood diffusion well but after watching this scientific video,I m different.Be bless biocinematics.Excelent presentation

[@ValentinoRossi-yv5zh]

i don't know why suddenly "hmmmm i know what diffusion is but don't know why", when i type it, then this perfect video showed. Thank you biocinematics

[@kdnar1435]

just found this channel. Please upload more content. You do an amazing job!

[@biocinematics]

Thank you! Working on it, I have a couple projects in the works

[@RowanSteyn3D]

really underrated channel, i also do 3D animation and this must have taken ages to make, good job :D

[@Sivah_Akash]

You too have an awesome underrated channel

[@RowanSteyn3D]

@@Sivah_Akash thanks :D

[@Agent_Ghost007]

Very good illustration. Thank you

[@burljantzen3238]

Just watched this again. SO well done! Amazing!

[@valerieholler8928]

This is an amazing animation and explanation! Might you make another that shows how osmosis affects a shell-less egg placed in corn syrup, and then removed and placed in water?

[@SweetBunnyMuah]

The detailing on this video is immaculate!

[@kevinelias1512]

Superb explanation and illustration. Please do more videos like this. You have a talent like gem/diamond/gold you can share for learners.

[@mms7146]

second year at uni and just now I could understand how diffusion actually works... thanks!

[@misteress8008]

Holy cow. With such amazing graphics/potential, turn up your recording volume please! Can't use this in my classroom because it's not loud enough. Cheers.

[@Dontknowwhatimdoin666]

This is really helpful! Thank you so much!

[@suisenshiroi1900]

Good job! I really look forward to watching your future video

[@user-mr2sf4no9f]

This channel is amazing, u deserve way more subscribers, I hope you will do some more videos in the future.

[@darshsinghal2405]

very helpful

[@adampax]

This video is just awesome!

[@GabrielKnightz]

Please make a video on Osmosis and how it pertains to brining a piece of meat.

[@موسى_7]

Exactly the video I was looking for! Subscribed! They HAVE to show this video in schools!

[@siphosethu5609]

Thank you , you helped me so mucb will share this with my friends

[@antoine1407]

Very nice! Could you make a video about convection?

[@harikarthi5139]

great video thanks!!!! and wts that simulation , how u did those ? can u brief out pls

[@EngZiyad-om1po]

VERY good video! By far this is one of the best videos for representing diffusion. Keep the good work up 👍🏻. I will talk about diffusion on Twitter and I will attach the link of your video in the tweet, I hope you don't mind.

[@biocinematics]

Thank you! I'd be happy for you to share the video on twitter. You can also tag me (@biocinematics). I've got a new video coming out next week which I think you might like as well.

[@EngZiyad-om1po]

@@biocinematics Sure gladly! I can't wait to see it.

[@Darkevil8110]

When I see this video it's super easy to learn on examples I am subscribe your channel 👍🏻

[@nightfiresturnedalvirollie]

I was watching Brownian movement, this came up so clicked it, and like three thirds though this video I realized you weren't gonna talk ab it and this was a video about diffusion...lol

[@Wishball38]

Thank you for this video! This will be fantastic for my physical sciences class. This is well explained and represented with the animated molecules!!

[@tanyafaltens5967]

This is a great discussion of diffusion with excellent use of computer visualizations! Very creative and effective use of that visualization tool. I appreciate your attention to some of the misconceptions that can confuse students about diffusion. I'm looking for a good explanation of the relationship between mean free path and the diffusion coefficient - or diffusion behavior. I think your simulations plus some statistics could show this. Thank you very much for this wonderful resource! Well done.

[@MC-F-p7e]

Would LOVE to see the entropy video!

[@MadameBouin]

Hello, thank you very much for the video. It make's diffusion very clear and allow to avoid a lot of misconceptions or simplifications used to explain phenomena like plasmolyisis for example. Do you think it is possible to explain plasmolysis of cells or chimioosomosis with this model ?

[@Leonardo-jv1ls]

What an amazing video. Loved it. Congrats.

[@rhinobridge]

That's the best diffusion explanation I've ever seen! And I'm a chemical engineer...

[@babymh100]

I love watching your videos

[@vladisslave.7500]

Very nice and clever explanation, thank you!

[@mariatamimi3255]

pov: you are better than my biology teacher. thanks.

[@gnadori]

This is very useful for demystifying some basic physical ideas! What is the program you use for the simulation of the molecules?

[@biocinematics]

Thank you! I used Houdini for the simulations. It's widely used in the entertainment industry for VFX.

[@TedGudmundsen]

This is really good!

[@BoomBoy-13]

You know that feeling when molecule science is tomorrow

[@ranitbanerjee956]

Sir please create a simulation for liquid also...I am little bit confuse of diffusion in liquid.

[@biocinematics]

No promises, but it's a good suggestion. I've been thinking about a follow-up

[@teemo8247]

I'm glad i found this channel lol, great video!

[@richardescobar8873]

it's a good video, thanks

[@menonks]

Awesome explanation. Loved it.

[@freyja2861]

this channel is a saviour

[@amirgiles]

Answered my question perfectly, thank you

[@kaziashiqurrahman7411]

Would you please make a video about osmosi?

[@suhaali8939]

Love this!

[@hateisafashion]

BRAVO! *standing ovation*

[@arneltinsay]

what did you use in simulating?

[@noeliaperez7340]

This video is great to understand molecular diffusion. Thank you very much! I wonder if you could make another video explaining the difference between molecular and convective diffusion...

[@lucasbalbino8332]

Fantastic video. Keep going and God bless you.

[@yorusan007]

I wanna know if solid can diffuse too? Like salt diffuse into water? Or solid-solid diffusion??

[@biocinematics]

Salt diffuses in water once some of it dissolves and is no longer a solid. I can't think of any examples of true solids diffusing into another solid, because solids hold together by definition. In other words the random thermal motion of the atoms and molecules isn't vigorous enough to leave its neighbours.

[@yorusan007]

@@biocinematics how about vacancy diffusion though. It rares but exist

[@pandorabaer]

Thank you for the video! My take home message: diffusion means randomness (and to reverse entropie is travelling back in time ?)

[@chloeholder1259]

amazing thank you so much helped me with online class

[@omarmuhammad6868]

I am rendered speechless. Man U r awsome

[@eng.maimonahkhader3311]

Extremely Helpful Really it is a good question and perfect answer Thank you

[@floralyt4263]

U cleared out my confusion.......thank u so much for making this video!

[@biocinematics]

I'm so glad it helped!

[@emilyjacobs6192]

Can i get the link for the sim please?

[@brynstclair5266]

love this! So intuitive thank you!

[@U9191-e6s]

really nice and funny way to learn

[@asiakhawar1241]

Thank you very much its wonderful Keep contributing .

[@llaannyyaa]

Thank you

[@RuhabDabeer-v7k]

Funny Stickman Hahah Amazing use of comedy with the stick joke that made me chuckle

[@LibraryOfTheOligarchs]

Appreciate this!

[@MrSoskiKrota]

Whoa it's been 50 seconds and it's already exciting!

[@lucaslin7890]

"this wall smells nice" LMAO

[@yannaroberts8624]

Omg, why did you stop making videos?! They're really helpful

[@janehobson34]

Can you make a similar animation showing the difference between facilitated diffusion and diffusion?

[@baikali9999]

Perfect

[@subhashinijkp]

Amazing video I watched it for chemistry though

[@abebawaragie6804]

Best one

[@TheRookieNerds]

Wow, absolutely gorgeous! Is decrease of pressure and concentration the same thing? In other words, when a bird flaps its wing down, does the net decrease in concentration above the wing push it upward ?

[@biocinematics]

Thanks! It's a good question, I'm probably not fully equipped to answer, but I'll give it a shot. Pressure and concentration are related, but not quite the same thing. I think of pressure as a force resulting from the frequency of particle collisions in an area (e.g. air pressure against bird wing), whereas concentration is the amount of a specific molecule type or multiple types in a volume (e.g. CO2 concentration). When a bird wing pushes down, there's an equal force from the air pushing up, in the same way as your hand on a table pushes you up. For a bird wing, having a low pressure area above maybe factors in too, in which case you have more particle collisions from below than from above, adding to the upward force. I'm no aerodynamics expert, so I'm just making educated guesses really. Hope it helps a bit though.

[@dryfixpreservation]

Hi Stuart, I really enjoyed this video and your other on carbon life forms. Thank you for taking the time to produce such a well illustrated video with narrative. I notice it's been sometime since.your last video but it would be a shame if you stopped with just 9 videos. I do hope to watch more in the future. Regards Russell

[@smartteach7649]

amazing

[@selmabouslama2671]

You saved my life

[@fractalnomics]

Does the density of the gas 'matter'? (no pun intended with the matter, but quite cool I think (no pun with the cool, but..)) I am thinking of cold air, hot air, and CO2 verses 'air'.

[@idobenamram3743]

awesome

[@Sivah_Akash]

8:12, *the probability of diffusion reversing is very low. Am I wrong? 😅

[@biocinematics]

Not technically wrong, but I'm trying to demonstrate that for all practical and measurable purposes, the probability is essentially zero. 2nd law of thermodynamics and all that.

[@Sivah_Akash]

@@biocinematics, oh. But since entropy can never decrease, is the possibility of not diffusing zero or is that not true?

[@biocinematics]

@@Sivah_Akash There can be other forces or energy used to prevent or reverse diffusion, (e.g. active transport across a membrane) but in systems without additional forces or energy used, diffusion will proceed and entropy will increase as a result. Does that answer your question?

[@Sivah_Akash]

@@biocinematics, yup it does. Thank you. One more question. So does that mean without any other forces, there not even a tiny chance of reverse diffusion? However small that probability is?

[@biocinematics]

@@Sivah_Akash I guess it kind of depends on what you mean by reverse diffusion - how many molecules, what kind of concentration gradient and for how long. There's a chance that several molecules will travel against the concentration gradient temporarily (as you see in the video), but the more molecules you look at, and the longer they move, the probability of large-scale reverse diffusion approaches (but doesn't quite reach) zero. That's my understanding, anyway.

[@BilalAhmed-yz4nq]

Can some one tell me why a molecule moves ? and what makes it move i mean ? and why it moves in straight line ? why not circling for eg 😅

[@drk7016]

Galaxies are evolved by gravitation, and the evolution process proves that energy can be transferred from low to high energy = energy accumulates by itself, so energy diffusion is wrong.

[@walterwhite190]

nice graphics

[@adnansakeeb739]

Why does heating cause molecules to move faster ? :/

[@biocinematics]

Fantastic question. I had to look up some stuff, and I'm probably not the best person to answer, but here goes. If you consider conduction, that's transfer of heat by direct contact. In other words, if you have a hot piece of metal, the atoms are jiggling very fast, and if you put that into water, the fast jiggling metal atoms will collide rapidly with the water molecules and make them move faster, thus increasing the average speed of the water molecules (and cooling down the metal, because some of the kinetic energy is transferred - think about billiard balls hitting each other). Now the harder part: how does radiation work, like how the sun heats up the earth? There's no direct contact between atoms. It turns out that certain wavelengths of radiation, like infrared, are "resonant" with the natural jiggling of atoms and helps increase the motion. Not unlike a certain frequency of sound causing a wine glass to resonate and vibrate more. That's an incomplete answer, but I hope it helps.

[@adnansakeeb739]

@@biocinematics ahhh i get what you're trying to say. Thanks for replying. I should do more research on radiation then :3. Nothing better than satisfying the inner curiosity in qurantine...

[@minimegaming0]

Hi science classmates

[@about-R]

👍👍👍👍👍

[@about-R]

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[@aapex1]

ENTROPY, please.

[@ibunlimited]

*Myself, The 1K-th Like hitter. Cheers*