The Laws of Thermodynamics, Entropy, and Gibbs Free Energy 

If you would like a more comprehensive explanation of these laws, go to my classical physics playlist! Clips 28-31 cover the four laws, one law per video, and they are much more in depth than what is mentioned here!

I teach both high school physics and chemistry. In the unit of heat, both of these classes overlap quite a bit. It was hard to find a good video explaining the laws of thermodynamics and entropy. I like KHAN, but they are too long. Others are too abstract or goofy. This gets to the point quickly as you speak very clearly and with conciseness. Any high school science student would find these clips good to watch.

Never thought I'd be taught the Laws of Thermodynamics by the Jesus himself, but I'm going to take it

This man saved me from failing my high school. I'm graduating with Physics honours next month. Thanks Dave ♡

Dave: There is a layer of math beneath the intuitiveness Me: *holds breath* Dave: ..we won't get into the math oh thank christ

Mom: why is ur room so untidy?? Me: it's entropy broo *slipper flies across room*

Professor Dave, I always enjoy watch your RU-vid videos and admire you for working so hard to educate others. Big Thanks!

at first you might not like the opening but after a couple of professor dave explains videos you'll be singing along no doubt

I'm a homeschooled sophomore. I watched this in seventh grade and took notes throughout. When it got to the question at the end, I actually got the right answer--without a calculator! It was explained so clearly and with such clever analogies. I'm watching it again just for fun! Thanks so much for this, Professor Dave! It answers a lot of questions for me and helps me understand much more about the way the universe works.

Im not a college graduate i was in the military but i still find what your saying so fascinating... i want to learn. Dont give up on me

I'm scrolling your video about fundamental of chemistry, I learned to recall my memories about it. I'm struggling to recall my first-second semester memories through my notes but I found out it really takes time. Prof Dave's simple explanation helps me a lot. Thanks!

Up to 5 min, I felt that I have learnt more than watching previously 50min of college chemistry teaching videos. Very concise and informative! Thank you!

That was scary I almost understood entropy😳

I will never look at hand soap the same way again. Your videos are all very informative.

I love Professor Dave now. The man does his homework, and explains things so beautifully clear and concise. Respect

Studied Chemical Engineering a while back and having a bit of a refresher on the basic principles. Really great job in explaining the abstract, which can take so long to understand. Learning 'what' and 'why' is so often conceded in favor of 'how' and 'when'. And yet it can be explained in 5 minutes.

Beautifully explained! Definitely nice when you can understand how all the variables work together. Thanks!

I am in first year of university studying chemical engineering and this video put the complex concepts very simply. Thank you!

Thank you professor Dave, your teachings on thermodynamics and Gibb's free energy was superb. I expect your more updates on physical and organic chemistry.

And the explanation about the soap, I represented my high school in a prestigious national science and maths quiz competition about 5 years ago and it was one of our questions. Really great explanation.

Thank you very much, Professor Dave! Your analogies and explanations with regard to the Enthalpy and Entropy relationship were crystal clear. It truly shows that someone understands a topic by being able to break it down as if you were explaining it to a 5th grader.

Thank you for explaining things clearly and making it easy to understand! I really appreciate your time and effort Prof!

Many teachers should take examples on your video to introduce these abstract notions of thermodynamics. Your explanations are very clear and concise. Your pedagogy is perfect. Thank you so much .

I've been having trouble understanding entropy for a long time. Your interpretation of entropy as a "dispersal or energy" really stuck with me. Thank you.

The explanation was so good that I could explain all the stuff to my friends clearly

Thank you Professor Dave I really appreciate all of your help!

Iam a malayali..l saw someny videos of others..but I can't understood thermodynamics..But from this I got everything Professor Dave ,now lam a big fan of u...thanks sir.. it's very nice👌👌 Keep going

Excellent explanation. I am no longer into studying physics but as someone with a background in science i still enjoy watching these videos explaining the concepts of physics which might usually be difficult for students.

This video was great! You're awesome at explaining the science stuff :)

I feel it was useless to attend school, I am a Ph.D. student now and I feel Homeschooling following these videos could have been a better option, Thanks, sir:). Amazing explanation, I get to take some lectures and I am totally transferring your knowledge that I get here

I can't believe you literally made me understand this concept in 8min...You're so amazing

Professor Dave, thank you very much! I had spend a whole day to read the material about the entropy, however i didn't got it! Without ten minutes under your presentation , I'm clear, Great job!

The part where you describe how soap works blew my mind! 10/10

This is the first time for me to understand gibbs free energy actually i watched so many videos before i watch you but i did not understand thanks alot ( you're the one :) )

Found your channel studying for praxis. All of your videos help so much. Thank you, thank you!

Your videos have given me an early headstart into what my chemistry course will be mainly about. Thanks for the detailed explanation! 😀

Nice explanation....my all doubts are clear now ....thanks professor dave

It was a great learning experience professor Dave

Prof. David, thanks so much! I took chemical engineering thermodynamics course two years ago and I never understood the concepts. Now that I am preparing to enter the world of work, I thought I had to understand these things as they are part of the most fundamental concepts a chemical engineer should know. I should have watched this video last two years! I'm very grateful.

This felt like a 30 min read. So much information condensed here. Thanks!

I like the table at 5:18 Thanks much!

Wow...you explain very well💙 Your teaching is superb...👍 And thanks for clearing my doubt 😊

Im doing a PhD in electrochemistry and working with high entropy alloys and oxides as electrocatalysts for energy conversion systems. This video is so comprehensive.

thanks for being so good in explaining ,i found best channel for my doubts just a few day back.I really appreciate your approach ,please keep clearing the concepts and making it easy for us to understand. Thanks sir.

Thank you Jesus

very helpful video, thanks a lot!

WOW! You just explained to me what my sir took one whole week of 40 minute classes, in just 8 minutes. Thank you.

Thank you! I had difficulty in understanding Gibbs free energy. This video helped me a lot to understand that Gibbs free energy can be a sign about whether the process is spontaneous or not!

Thanks Professor Dave , as always . Today is Teachers Day here in my country India A very Very Happy teachers day ! keep making videos and educating all! (Out of topic) - Do you like Breaking Bad? :P

thanking you sir It was super explanation..and I got good clarification

This is the first of these I've seen. Professor Dave is awesome.

Great effort❤❤ I am a Syrian Chemistry-Olypmiad member used to watch your Chemistry vedios Thank you very much❤❤

Interesting to have the hills in the background. Spontaneity, as I understand it, can be thought of as a ball on a wavy terrain (we can just use a squiggly line) during an earthquake. On this wavy terrain, there are a few valleys, separated by hills. These valleys represent the different things our ball can do, just by occupying one of those valleys. Some of the valleys are higher than others. It can be easy to imagine that the ball might find its way from a higher valley to a lower one, but only if the ground is shaking enough that the ball can overcome the hill that separates them. Then the ball will most likely be moving faster than before, since overall it has rolled downhill. In many cases, this added kinetic energy can represent heat (since that's what heat is anyway). Similarly, the ball can actually go from a lower valley to a higher one, again if the ground is shaking enough. But if the ball goes in that direction, it will slow down. There's some funky interplay between the speed of the ball and the magnitude of the earthquake, since both of these essentially represent heat. That's where analogy breaks down a little.

You're awesome dude ! I've recommended your RU-vid Channel to my biology class :)

I'm a chemistry teacher and I just found the explanation I'll be using from today onwards. Brilliant!

Currently studying the subject on the basic level. Learnt more from this video than 2 years of my uni. Thx a lot.

Now I found out the true reason why my room is always messy. That's because of the entropy of the universe. My mom misunderstood me all the times "son, you're to lazy to clean up your room"

Hi Dave- Micellization is actually (usually) an entropy-driven process. The reason is the destructuring of water molecules upon micellization.

The micelle graphic; blew my mind once the visual representation "clicked". Another awesome vid.

This really helped me better understand conceptually how Gibbs free energy relates to spinoidal decomposition and thermodynamics in general, thank you.

Professor Dave! Your lessons are world class! Thank you so much.

This is amazing. Ty Professor Dave. My concept of 'time' since I was a child is now just a theory for me and I use enthalpy and entrapy every moment of life to govern my decisions. I have since had a low stress life.

Very well explained. Keep making these great videos!

you have a knack for explaining this concisely.

When he described soap I was like what the fuck the what.

Your channel is a gold mine. Thank you ♡

SIMPLY AMAZING THANK YOU PROF. DAVE !

Thank you for this refresher, Professor Dave. 🙂

your videos are awesome professor! keep it up...I consider myself as your student...Im taking master in engineering in Mechanical Engineer...😀

thanx sir for your contribution in educating people

I spent 4 years in Bachelor's of Mechanical Engineering and Learned as much as this video. Thank you professor.

I literally don’t understand how good you are at teaching. Like omg

Whenever I see you, I remember "Chemistry Jesus" Can't stop laughing 🤣

thank you professor. :)

Sorry, a late comment. I am a big fan of you. This is perhaps the best under 10 minute lecture of Intro to Thermodynamics I have seen. Very few people can explain a very difficult subject as clearly as this! I would give this a big 10 thumbs up if I could.

Thank you Professor Dave i wish all teachers can teach the same way you teach

Your videos are very didactic. They are also great to train English.

I finally got it. Thank you.

Great resource. Thanks for this channel, Prof Dave

I hope you know you are truely amazing. You juste made everything so much more clear! I love you!

Entropy: I "fight" it daily.

3:52 pure gold

Man you reply to all the comment to clear everyone's doubts #Respect

Hi Professor Dave! Loved this video, taught me a couple of useful things I never new about The Laws of Thermodynamics! Never heard it explained that way on what it means, and what it does, and makes a lot of sense on how to use it! I really liked the practice example problem at the end to solidify it! I'm glad the solution is provided to be able to check, as my first calculation I forgot to convert Joules to Kilo Joules on the Delta S term : )

Thank god for Professor Dave

+Professor Dave Explains liked the video, how ever I found the "programming analogy" @2:10 a bit "odd" as I have read/heard the "diametrically opposite" being argued. I suspect this difference might depend on what "scale" You are observing/describing the "phenomenon" at. So in Your case You are describing it on a rather "high (macro) level", and only demanding a "general description" of the "state". How ever if You were to look at it at the "micro level", where You have to describe the position (and possibly momentum) of every atom, the liquid would be "harder to describe" and demand vastly more "code". And if I'm not mistaken (which happens ;) when talking about information theory the more random a file is the higher the entropy is considered, and the harder it is to describe it in a "shorter form" i.e. to compress it. And hence it's harder to ((losslessly)) compress a picture of a given size if it contains white noise than if it depicts a chequerboard ((or any other regular pattern)). I thought it might be usefull to know that this "alternative explanatory analogy"exists, especially since it's so "different". Just my 5c's. Keep up the good work Best regard

Thansk a ton...rally thanks..watched it 10 times to make sense of it ...still may not have understood in totality but this is byfar one of the best explanations of gibbs free energy .....

thanks for making learning easy & interesting. it's just going very smooth manner, even a high school student can get the concept . wonderful explanation with wonderworking animations 👍

Professor Dave; "That's how soap works" Babylonians; "We just thought it cleaned stuff"

"[...] and as an aside, let me drop some knowledge on saponification: [...]" Nice.

This was really good, thanks Dave!

this was awesome...especially the gibbs explanation

No clue how I ended up here, but what a great mistake it was, you are seriously awesome!

dave grohl helping me with my bio final *calm face emoji*

you are an awesome professor I'm glad that I found you today I wish you a very happy teachers day sir

Loved your comment on the first law of thermodynamics - "works perfectly fine, except for quantum". Nice nuancing of the concept!

3:00 AM in the morning and my smart ass got curious in thermodynamics

A non-mathematical presentation of the Laws of Thermodynamics: The Zeroth Law: There is a game. The First Law: You cannot win the game. The Second Law: You cannot break even. The Third Law: Tells you how much you will lose.

Whenever i will get doubt i will search for your videos... videos.......thanking you sir..... For giving us such an interesting videos.....

Great presentation , short & to the point ✨