> phys-stat-thermo > fonda-phys-stat > entropy-is-not-disorder-micro-state-vs-macro-state

Entropy is not disorder: micro-state vs macro-state

Physics Videos by Eugene Khutoryansky - 2016-06-21

Entropy and the difference between micro-states and macro-states.  My Patreon page is at https://www.patreon.com/EugeneK

Physics Videos by Eugene Khutoryansky - 2018-12-23

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Hardik Pande - 2019-01-27

Conclusion: "All micro states are equally likely but not all macro states are equally likely".
Thanks for the outstanding video.

DallasGreen123 - 2016-07-13

9:50 cineastic masterpiece, I shed a tear over this beautiful scene

Physics Videos by Eugene Khutoryansky - 2016-07-13

Thanks for the compliment. I introduced the characters in that scene in my video, "Thermodynamics and the End of the Universe." If you have not yet already seen it, it is available at the following link.

Bruce Johnson - 2017-02-28

Truly one of the best scenes in science

Historia-sama - 2019-04-26

Shaggy was there too

pizzaspy - 2019-07-17

Just as a fragile peace between the robodog and cosmic bear empires was achieved, the impending heat death made it all seem so meaningless. :(

Yagyaansh Khaneja - 2017-02-19

i dont know why doesnt the world appreciate your videos ... they are so clear and totally understandable!!! u deserve a lot lot more subscribers than pewdiepie has right now !!!

Yagyaansh Khaneja - 2017-02-19

i just seriously want to meet u and say thank you for such great effort and amazing videos!!

Physics Videos by Eugene Khutoryansky - 2017-02-19

Thanks for the compliment.

Ravana Brahma Rakshas - 2019-06-26

Yagyaansh Khaneja answer: majority of humans are stupid. prostitutes si gers and dancers and clowns have millions of views. no more proof is required.

ASHLEY SAVIOUR - 2020-02-03

Maybe because of the background music

Brad Cozine - 2019-03-23

I need a "Caution: High Entropy" sign for my door.

Will be free - 2019-06-24

Why, do you have an unusually large living space?

Nitko - 2020-03-06

@Will be free Good one

Albert Einstein - 2016-06-21

I used to think about this so much.

Sean Dafny - 2016-10-04


sticky frog - 2016-06-21

Your videos are excellent. I didn't know you had a Patreon. Definitely going to support you.

Physics Videos by Eugene Khutoryansky - 2016-06-21

Thanks for the compliment about my videos, and thanks for the donations on Patreon. I really appretiate the support.

Mikle Talalaevskiy - 2016-06-21

Thank you for keeping the music volume low. I wonder if there is a graphical quality upgrade planned?

Googelplus Sucksys - 2016-08-03

None needed. It's functional and hilarious.

MrHatoi - 2019-09-11

10:07 This looks like the end of an anime episode

Misael Cifuentes - 2016-06-21

I always get excited when i see notification of a new video from this channel

Physics Videos by Eugene Khutoryansky - 2016-06-21

That's great to hear. I am glad that you like my videos.

Chat botté - 2016-06-22

Same, the rythm and the illustrations are perfect to understand all the explanation

StoneBrain - 2019-12-13

Watched these vids 20 times.. I think i'm starting to really get this. I love these "Aha" moments. :D

Physics Videos by Eugene Khutoryansky - 2019-07-14

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Titurel - 2017-07-26

Thank you!! I've hated that entropy is disorder concept for years!

k1w1 - 2017-06-29

Eugene, thanks for this video. I've lately been watching a few vids about entropy to try and properly get my head around it and this has certainly helped. Thanks again.

Josh McGillivray - 2016-06-21

This clarifies my misunderstanding from"Entropy: Why the 2nd Law of Thermodynamics is a fundamental law of physics"

Thank you for the video! Great as always

Physics Videos by Eugene Khutoryansky - 2016-06-21

Glad you liked my video, and that it helped clear up a misunderstanding. Thanks.

rubjellyonme - 2020-02-19

newtons laws dont hold up anymore they suck

ripsirwin1 - 2016-06-21

Thank you. This is one of the greatest misconceptions in physics

Physics Videos by Eugene Khutoryansky - 2016-06-21

I agree. That is why I wanted to help clear this up.

The Ultimate Reductionist - 2016-10-13

THANK you GREATLY for addressing this TERRIBLE myth!

elisha carlton - 2016-10-06

Bless you, your visuals with the explanations are amazing and really help us visual learners who struggle to understand concepts from a lecture with 300+ people

Electro-Cute - 2017-04-05

Finaly a good explenation of entropy! Thank you! :D!

Physics Videos by Eugene Khutoryansky - 2017-04-06

You are welcome and thanks.

Kommandant7 - 2017-01-22

9:08 is so far my favorite animation! Superb job piecing together the universe like that.

Physics Videos by Eugene Khutoryansky - 2017-01-22

Thanks. I originally made that animation for my video "Infinite Universe?" at http://youtu.be/IFdfrtzo4SY

ghlendary - 2016-06-21

YESSS such a good one i've had this on my mind for some time

Physics Videos by Eugene Khutoryansky - 2016-06-21


Russian Blue Cat - 2016-06-21

Thank you for your vids! Could you make a few vids about music theory? Cant even imagine how impressive could it be.

britney lohan - 2018-04-05

Thank you so much ❤

Tuan V Nguyen - 2016-06-21

4 years in mechanical engineering but the concept of entropy is still the pain in the neck

Evan490BC - 2018-09-11

You shouldn't have big problems grasping the concept! The main idea is not to think in terms of states but in terms of whole state spaces and probability measures defined on them. The entropy is just a (weighted) measure of how spread out these PDFs are. That's all.

Evan490BC - 2018-09-11

@Tuan V Nguyen ...and entropy wasn't one of them. He expressed his "ignorance" regarding quantum mechanics.

MGTOWTakeru - 2018-12-23

Its not that its difficult to comprehend it is the maths that is hard

NUKE - 2019-10-14

Entropy is a pain in the ass because everyone wrongly associates Entropy with disorder, and as it turns out, disorder is just a word that can be interpreted differently from one person to another... My order is someone else's disorder and visa versa.

What Entropy really is, is the amount of information NEEDED to describe a system
Disorder comes as an emergent property of Entropy but is completely irrelevant and has nothing to do with the definition of Entropy or to what entropy really is.

Entropy "S" is S=Kβ*LnΩ

Whether or not that has anything to do with disorder is a philosophical question...

Entropy expresses the number Ω of different configurations that a system defined by macroscopic variables could assume. Under the assumption that each microstate is equally probable, the entropy S is the natural logarithm of the number of microstates, multiplied by the Boltzmann constant kB.

SUNNITH REDDY - 2019-10-31

Just started studying thermodynamics in second year. My biggest problem is entropy and enthalpy.

oobi o'doo - 2018-01-23

At last, something explained simply that even I understand it. Thank you 👍

Nick Demos - 2016-06-22

Thank you for making such awesome videos! I have been binge watching them lol! (I am new to your videos and they're awesome!!!!!!)
P.s Could you pretty please make more calculus videos as i'm new to the subject and it's so much easier to gain a perspective when it is visual. Thank you for making these videos! :)

Claire Molleman - 2019-11-10

I can’t thank you enough for finally making me understand what others tried to explain to me for such a long time.

Physics Videos by Eugene Khutoryansky - 2019-11-10

Glad my video was helpful. Thanks.

Canana Man - 2019-10-16

1:00 that's just something your mom would tell you

Edward Candle - 2019-12-12

humM wHat? xD

Florian Berhami - 2020-02-19

I'm always coming to your videos for stuff I listen at university, and you always are so similiar to what and how they explain. I really appreciate your work, may I ask if you have a similiar background ?

akash patel - 2017-10-05

After some thoughs :I can't say that.

Space Pirate - 2016-10-06

Great explanation !
Awesome lucid language easy to interpret
well done guyz

Dante S. González - 2018-03-05

Please, enable closed captions! :)

Panu Pentikäinen - 2017-04-25

Your physics videos are among the best on Youtbe. Thank you for your effors.

Physics Videos by Eugene Khutoryansky - 2017-04-26

Thanks for the compliment. I am glad you like my videos.

sirkowski - 2016-06-21

Love watching these!

Physics Videos by Eugene Khutoryansky - 2016-06-21

Thanks. I am glad you like my videos.

Jairo Santana - 2016-06-24

I love the way that you explain things. Ill start to donate as soon as I can since I binged watched like 30 videos. haha, thank you so much!

Physics Videos by Eugene Khutoryansky - 2016-06-24

Thanks for the compliment and I really appreciate the fact that you plan on donating. That means a lot to me. I hope you enjoy all my other videos just as much as you enjoyed the 30 you just watched.

Lucia - 2017-02-07

Best explanation I've ever seen :D

Physics Videos by Eugene Khutoryansky - 2017-02-08

Thanks for the compliment.

Salam Samer - 2017-08-15

You are great. Thank you for this wonderful explanation

Physics Videos by Eugene Khutoryansky - 2017-08-16


Abrar Hasnat - 2017-09-14

really love this channel 😍😍

MultiMrHP - 2016-06-22

Sweet videos, love this channel

Physics Videos by Eugene Khutoryansky - 2016-06-22

Thanks. I am glad you like my videos.

Luka Ravlić - 2017-11-12

Wow, I never thought I could trully understand entropy until this video.

Brian Blanchard - 2016-06-29

this is one of the most underrated youtube channels i have come across. honestly the quality of this content is just so great. definitely adding to my patreon as well!

Sungwoo Yang - 2017-10-12

Best channel, I know. I appreciate your work.

Physics Videos by Eugene Khutoryansky - 2017-10-13

Thanks for the compliment.

Hetanshu Bharadiya - 2018-03-25

Love Beethoven in the background. Excellent video!

Physics Videos by Eugene Khutoryansky - 2018-03-25

Glad you liked my video. Thanks.

Maskim - 2016-06-21

Cool aliens at the end! I love aliens!

Physics Videos by Eugene Khutoryansky - 2016-06-21

These aliens play a much larger role in my video titled "Thermodynamics and the End of the Universe" at the following link.

Kowzorz - 2016-06-22

Is entropy increasing being necessary tied to the expansion of the actual space of the universe?

Hank - 2016-08-15

@Oliver Witherspoon
"how can the increase in possible outcomes not increase the odds as well?"

It depends on what 'odds' you are talking about. If you mean the more possible microstates you have, the greater the odds of being in any one particular microstate then yes, it will increase the odds. Odds is a general term and not anything with odds has an entropy. If you have a cup with 2 six sided dice it and a cup with 2 twelve sided dice in it, which one has greater odds of snake eyes being thrown? Does that mean it has a higher entropy? Entropy is not defined as 'odds of something happening'.

Entropy is a macrostate variable similar to temperature. The easiest way to think of it is as a distribution of energy... when energy in a system is as evenly distributed as possible (none available to do work) then entropy is at maximum for that system.

David Lloyd-Jones - 2017-09-04


Wurtt Mapper - 2017-12-25

Check out the Bell inequalities

Bradley Layton - 2018-06-17

Kowzorz, Maybe


Loren Wilson - 2018-08-15

As I understand it, the entropy of the universe will increase whether the universe is expanding or not. All processes are irreversible, even in a universe that is not expanding.

Rogério Gouvêa - 2019-12-17

I'm addicted to this channel, please make more videos. Maybe regarding solid state physics! ❤️

Physics Videos by Eugene Khutoryansky - 2019-12-17

More videos are on the way. Solid state physics is on my list of topics for future videos. Thanks.

thanosAIAS - 2017-08-18

This video is a contribution to science and the rest of us. Thank you soooo much for clearing the entropy concept!!!

Physics Videos by Eugene Khutoryansky - 2017-08-18


Hama Talabani - 2016-06-21

freaking amazing

Physics Videos by Eugene Khutoryansky - 2016-06-21

Thanks. Glad you liked it.

Ranjeet Kumar - 2017-12-20

Make more videos on classical and modern physics and also make on chemistry's topic

Olle Welin - 2017-09-03

Great. Have struggle with made better stirling engine for years, so at least I get in touch with entropy also in practice