The Critical Point is Not the end of the line (VDW Eqn. of State pt. 1)

[@MrDino1953]

It was totally worth watching the extra bit at the end as you successfully unified the 2 different worlds of comedy and science.

[@imacds]

Traversed the void between them.

[@bepispaul2419]

he crossed the critical point, where comedy and science become one

[@1st2nd2]

I would contend it is a triple point between science, science communication, and comedy. Or a triple line, or a triple state, or a triple line seg- oh crap!

[@randommm-light]

Please! The second vid!! Amazing depth, new signal appreciated.

[@Alorand]

I love it when the KZbin Algorithm recommends me exactly the kinds of videos I would want to watch, even though they have very little views for their quality.

[@itsowenstylez3857]

woah, it blew my mind the way to see the chart not in 2d but 3d. It does make a lot of sense if you view that way

[@litterbox019]

12:56 my based detector is going off the charts!

[@TesserId]

Oh when you mentioned the phase diagram of water, I was so hoping to see this 3D plot for the various crystalline phases of water, even just a few of them to get a sense of what benefit the 3D plot might have for that.

[@brunscus]

Wow, you just clarified for me the part of my masters degree that I couldnt get my brain around (or actually I did get my brain -around- it, and hoped I could BS my way around it in the exam as well, which I barely did). Video format helps I guess, but still very well explained, thank you!

[@georhodiumgeo9827]

That was really good. Thanks for the explanation of the phase diagram and also how to not be a smug jerk.

[@as-qh1qq]

Though a bit advanced, the in passing mention of failure of theory near criticality could be a great seague into Landau Wilson theory , RG flows, non-zero non-local correlation and so on. That could be a whole separate video

[@philipoakley5498]

And cloud chambers..

[@andst4]

The 3D diagram is brilliant. I've been amazed by the critical point once I first saw the video of transition. This video let me see the phenomenon from a wholly new perspective.

[@m13253]

The first video that finally made me understand phase transition and critical points!

[@xXxLolerTypxXx]

10:18 Just a thought, is this why water ice is slippery? That it partially melts and creates a liquid layer when pressure is applied? This is so cool.

[@nosy-cat]

Yes, that's the traditional reasoning. But it seems there's some disagreement on how much this effect really contributes to creating the liquid layer, as opposed to other effects like friction heating...

[@FoxDog1080]

I like how it ends abruptly

[@Speed001]

11:00 12:45 Thanks to @pbsspacetime for motivating me to finish this video sooner. One minor point of contention: dragons don't live in the supercritical region, they live at the phase boundaries. Thanks for linking sources.

[@Drad_]

Oh yeah baby, we better be going to 4d next!

[@wep6433]

Right, I wonder how many complex relationships between variables could be made clear if we could conceptualize 4D graphs intuitively

[@StainlessHelena]

Fantastic video. That 3D diagramm just clicked so neatly in my mind. It's also great that you touched on the ways in which to communicate knowledge. A point I find to be super critical.

[@ilessthan3bees]

Oh wow, I subscribed right before your rant about pedants at the end. It's a good thing too because if I waited until after the pedant rant, I would have broken the subscribe button by smashing it too hard. Pedants are usually people who misunderstood the point and are very proud of it.

[@tanchienhao]

U deserve more subscribers!!

[@yaduk7710]

The greatest thing ive seen in a while. I feel my mind expanding in size. I didnt realize pvt diagrams were a thing

[@fanthomans2]

Fantastically good educational video. Good job.

[@the27th81]

The 3d diagram was new to me, thank you for this video!

[@antoniolewis1016]

Thank you. This has bothered me for 10 years and you helped me understand it.

[@realGBx64]

Thanks, I will show this video to my students.

[@Oberon4278]

Can confirm, I am no longer friends with someone who did nothing but try to be smarter than everyone by contradicting everything all day long.

[@fibbooo1123]

Great video!

[@Mikelaxo]

That's awesome, I feel like I've unlocked a new realm of knowledge

[@spasdimitrov6728]

Omg! I wanted to know what the diagram would be for water and was wondering how I'd find it on the internet, bit he showed it in the video. Really good video explaining everything very well and intuitive

[@pauln07]

How da hell did a 13minute video explain it better than half a year of uni

[@MrKyltpzyxm]

This is very interesting. I love seeing all the myriad layers of reality peeled back to reveal the granular details. Trying to be mindful of all of the various "dimensions" of characteristics interacting in any given cubic centimeter of reality gets overwhelming quickly. (For me at least 😂) It's reassuring to see it all laid out so clearly. I especially liked the side by side of the three different graphs showing the way each relationship changes in relation to the others. Theres even the added bonus of a video of that change happening in a practical demonstration. It's a nice reminder that we really can know detailed things about complicated stuff.

[@tsingtak642]

it blows my mind

[@nlo114]

I immediately thought of Magma and volcanoes. This all makes sense to me now, and it looks as though the core of the earth is not molten, but a solid lump that gets 'squidgier' as it approaches the surface. Well explained, thank you! 🙂

[@antonioldesma]

This video would have been so useful just a couple of years back. Amazing fully understanding it now nonetheless

[@FurryEskimo]

This was very helpful, thank you! I really enjoy highly educational, visual videos.

[@christophergilbert5988]

This is an amazing video! I never really understood the critical point, and it makes so much more sense now!

[@as-qh1qq]

Patient and clear explanation. Keep it up.

[@plopgoot5458]

Nice Pratchett reference

[@gavinkemp7920]

Ultimately it's a case of diagram usefulness over explaining how the world works. The traditional phase diagram is most useful because it contains most the most useful information provided you understand the physics and whilst I couldn't have explained it like you did, I sort of knew this. The one with volume is nicer for understanding the equilibrium but doesn't contain the most useful information m.

[@VaraNiN]

Great video! Subscribed! More pls

[@DarthBlazer.]

I do wonder if we could use the transitioning of states, particularly, the critial point opalescence to efficiently seperate gas/liquid in processing. admittedly it's not easy to maintain the environment needed, but that layer separation appearing is pretty freak. Seems like it doesn't agree with entropy lol

[@AndrewJing-wp3vq]

This guy’s based. Subscribed.

[@PamSesheta]

Excited to see fractal mixing math soon.

[@Filip_Wessman]

The last bit was best.

[@nosy-cat]

For once the YT algorithm came up with something good. Awesome video, thanks!

[@He110ter]

Man, I should send my kid to whatever grade school this guy went to with teaching phase charts, I'm sure they also touch on partial differential equations and general relativity (tongue in cheek).

[@c64cosmin]

Gosh this was such a great and clean explication, thank you very much!

[@deldarel]

amazing video! The algoritm works in weird ways. The only comment older than 2 weeks is 1 month, and the video is 6 month olds. Anyway, this video deserves to be picked up. It was very insightful. In reality the PT diagram is the most practically useful one, but you really need the full system in order to understand what actually happens, why lines are traced, and why the critical point is what it is.

[@chranenaveverka3537]

Great video

[@tompw3141]

1) You showed P/T and T/Vm diagrams for when the solid is more dense and less dense than the liquid... what would they T/Vm diagram look like if they were the *same*? 2) You showed diagrams where the densities are S>L>G and L>S>G... what about the other four orders? (S>G>L, L>G>S, G>S>L, G>L>S)

[@justinchang6763]

Bro do a great job explaining it. Imagine learning this on a thermo textbook with out video with only diagrams and words 😂

[@feuermurmel]

Why do you only upload in 480p? Would love to see the animations in higher quality! :)

[@KaiHenningsen]

Smartass: "You cut a bit too early at the end of the video!" Audience: "r/Whooosh"

[@davidcora2751]

Thanks very interesting!

[@KrasBadan]

That's so cool

[@Javie3]

Yo this video has been a rollercoster of emotions, and I think the only thing I've leaned is that people can get irritated when trying to make sense of confusion graphs,and that nothing good happens after the youtuber says the video is over xd

[@wep6433]

It’d be awesome to have a rotating 3D diagram of this so I can fully grasp it.

[@Axacqk]

Before it was explained, I thought V would be for velocity, and the whole video would be about phases of moving fluids (within the boundary layer). Are there interesting phenomena there? Does the phase diagram get distorted in the boundary layer at high velocity gradients?

[@chavita4321]

This video is so fucking good in so many levels lol. Cheers m8. Bravo.

[@louisrobitaille5810]

4:00 Isn't this physically impossible? No matter how slowly you push down on the piston, you will necessarily increase the pressure in the tube which will raise the temperature 🧐.

[@itzachan3201]

You are right, it is an "ideal assumption". Scientists love to work with models wich are smoother than the real world, because it allows to focus on one phenomenon. Otherwise explaining the world really can get overwhelming

[@rubenayla]

If you have a material mostly liquid with a bit of gas, and you increase the temperature under fixed volume, according to the diagram, all the gas would become a liquid (right at the left of the critical point). Is that right?

[@mahxylim7983]

Well made vid with love...Share the love❤❤❤❤

[@Chrisazy]

Honestly a great video, and a great channel. I'd recommend that since your videos have low views, you should avoid the explicit "Pt. 1" and (Part 2) in your titles. Even if it's unconscious bias, people are less likely to tend toward these videos for subtle reasons like that, and as the comments say, you deserve WAY more subscribers than you have.

[@tricky778]

If I see a part or chapter in the title of an educational video i get excited, i guess someone's thought about their content carefully.

[@viliml2763]

Why would stupid people need to watch science videos? Not everything needs 100 billion views. Don't bend your knees to the Algorithm.

[@vaakdemandante8772]

To me it's actually encouraging because I know it's material that has been deliberately partitioned and hence is easier to digest and more structured than one long video or a bunch of videos with various titles that to a novice may seem like a disjointed mess.

[@tricky778]

@@vaakdemandante8772 it would be even better if it were 1 of 3 and suchlike so we know when we're missing something too

[@jack504]

Really enjoyed the video. Gave me a similar vibe to the asianometry channel. Maybe crossover in style and humour 👍

[@rubberduck2078]

Can you show how this kind of 3d graph looks with the metastable regions?

[@nice3294]

I had so many oohhhhh moments watching this video

[@RolandTitan]

Badass video buf

[@beatricebortoli3264]

thermo sharpness blesssu

[@A.I.rchist]

This is super well explained. And your voice is good don't worry.

[@peteraschubert]

What would be happening if there were four spatial dimensions?

[@Gabriel-cf3bw]

To be honest, i want to show the end of this to my professor, so he can understand why he has no friends.

[@angelmarauder5647]

Enthalpy and mollier diagrams are important for steam engines.

[@Kram1032]

It's kinda weird that the volume somehow determines the behavior as, unlike temperature and pressure which can be given per point (they are intensive), volume is a property of the whole thing and changes (by construction, duh) if you look at smaller sub sections. EDIT: ⬆this is nonsense: The unit used is molar volume, which is volume per mole (or specific volume which is volume per mass) which is an intensive quantity which also means ⬇this isn't quite right either What happens if you look at other types of quantities? Like, say, does anything interesting happen if you take pressure, density, and, as a third thing, entropy? Clearly you ought to get the same phases overall. But perhaps the phase transitions would look different somehow? And the picture also becomes way more complex if you add more materials into the equation, rather than having something pure. Perhaps you can achieve quadruple points (where two substances are matched such that they both are on their triple line at the same time)?

[@MrKyltpzyxm]

I'm glad the edit was done as an addition rather than an erasure. It's always interesting to get an glimpse into the thought processes of others. I often find myself doing this very thing where it's only after considering additional implications of what I've written down that I realize that my prior train of thought was lacking some critical insight that alters the cascade of logic. Sometimes it feels like having a debate against myself. 😂

[@gutwrenchingdeaths]

this guy's voice is uncannily similar to animator Domics

[@caetanogarelli6657]

Amazing video! It was very interesting

[@corrompido7680]

here be dragons :')

[@crawkn]

I watched a whole lot of liminal spaces videos and I never saw any dragons. Does that mean the videos were fake?

[@cswalker21]

Oooooooh. This whole time I thought it was "super critical" because the fluids were like really, really important, not because they are beyond the critical point. Gee. I'm dumb.

[@sock7896]

ACKSUALLY thats a triple line SEGMENT a tripele LINE implies it extends to each infinity alongs its AXIS edit ah frick you predicted this. CURSES

[@sifilo]

I don't get it but I think I'm learning something

[@jucom756]

Hey you don't get full extra credit, because as it turns out, water is even weirder than just a less dense solid... there are multiple different ice crystal structures, of which some are actually mire dense than water, each with their own region on the PTV graph!

[@crackedemerald4930]

Erm, actually, it's called triple point's monster 🤓

[@rafgam]

got a bit personal in the end

[@Daniel_lebieR]

Awesome Video. Made me remember a lot of things I had forgotten. I (especially) liked the end. ...back when I was in University there were always those "special" students who pointed out edge-cases/special terminology in the most basic lectures (which included medical students, biologists, ...). And then acted as if the professor had done some sort of "Science Heresy/Sakrileg". Interestingly enough most of those guys dropped out after 1-3 semesters. There is a big difference between beeing a (committed) student/scientist and beeing a smart-mouth.

[@Konomi_io]

caption jumpscare

[@Kapomafioso]

WELL AKHCHYUALLY YOU'RE WRONG, iT's NoT a TrIpLe PoInT, iT's A tRiPlE LiNe!!!11!! Did I do it right? 🥺🥺🥺

[@nekodjin]

fix the captions plsssssssss 🥺

[@shodanxx]

As a heat pump, air liquefaction, organic ranking cycle, seasonal temperature storage, thermal sonar enthusiast I find all this fascinating. More please! Well earned subscription Question for you, is there an open source repository of these 3d diagrams for all know substances and is there a good open source 3d thermal simulation software to explore them? Thanks !

[@Maric18]

im so confused about what to think about the american education system if 10 year olds are learning about phase diagrams and molar definitions of ideal gas laws

[@cefcephatus]

Water is weird because most material relies on 1 dominant force in their molecules. Water however, has bratty personality and stop listening to Van der Waals force and starts listening to electromagnetic force instead. Curse you Hydrogen bond.

[@liquid2499]

Weird misreading or misunderstanding of why people excitedly share things they’ve learned that add extra context or nuance to things, even though sometimes they may do so thoughtlessly or recklessly. Not sure if you’ve just adopted the use of that dismissive and disdainful characterization as a social integration strategy, or this is some kind of externalized negative self-talk, or you’ve just not been exposed to the private thoughts, experiences, and feelings of the so-called “freindless” people, but it does come as a bit of a surprise. I can understand why that kind of behavior can come off as disruptive or pedantic and annoying, particularly to instructors with timelines and lesson plans to keep, but the assumption of self-righteousness and grandiose self-appraisal or strategic intent to inflate one’s perception as motivating factors is, I believe, misplaced and can be a harmful set of biases to carry, not only for the specific people targeted by them, but also for the broader relationships even the quality of work of those carrying them. Hope you at least take the thought to heart and consider it for a moment, and thank you for the excellent work you do.

[@dckatyx9577]

Triple point and PV=nRT in elementary school?!? Not in the US. But they do learn that they may have been assigned the wrong sex at birth!

[@Praecantetia]

In grade school? excuse me?

[@FenrizNNN]

English is not set in stone. You have to remember that.

[@Sibula]

Is it just me or that 3D diagram for water kinda sucks?

[@drivingforgiraffes]

In my experience, PBS spacetime frequently misrepresents scientific topics in minute, but irritating ways. I try to avoid them.

[@aleksitjvladica.]

Density, volume, pressure, nothing makes sense, volume is useless, density and pressure are the same.

[@digdigdigo]

what

[@ChristianConspirator]

Wrong. I have no friends because I hate everyone

[@JainZar1]

Supercritical water is probably my most loved state of water. Yes I am an engineer working in thermofluids and aerothermodynamics.

[@georhodiumgeo9827]

That was really good. Thanks for the explanation of the phase diagram and also how to not be a smug jerk.