Entropy

057 - Entropy

In this video Paul Andersen explains that entropy is simply the dispersion of matter or energy. He begins with a series of video that show the natural direction of processes. According to the second law of thermodynamics the entropy may never decrease in a closed system. In irreversible processes the entropy will increase over time. The entropy will increase as volume increases, phases change, temperature increases and as the moles of products increases.

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Music Attribution
Title: String Theory
Artist: Herman Jolly

All of the images are licensed under creative commons and public domain licensing:

[xiocrafter]

This guy is excellent.  He's not trying to deliver flashy sound bite edutainment, unlike another popular Youtube chem series I've shown in my highschool chem class.  Just concise, elequently presented lessons that enrich already interesting yet difficult topics requiring clarification for most students.

[slidersamac]

Dude. That was absolutely not confusing and your graphics were so neat and organized. Thanks for your hard work; I understand entropy now! :)

[jimkeller]

Actually, the reason for not crying over spilled milk is that it's irreversible.

[henryjan]

I tried a chem textbook. I tried google. I tried other sources. This one was the only one that made it obvious what entropy is. Thank You Bozeman Science.

[andrewfanelli]

Excellent video! Entropy is so confusing to my students and this is the first video I have found that does a good job explaining it without oversimplifying a complex concept. Thank you!

[cocosings]

I go to a very rigorous school, but can I just say that Mr. Anderson has helped me raise my grade two letters and actually I've been beginning to like Chemistry when I couldn't even keep my eyes open before in my hour long classes. Thank you Mr. Anderson! And people who like CrashCourse are just blinded by their graphics and designing, they lack clarity unlike every single Bozeman Science video.

[boratsuckdiev]

I think there is a deeper meaning in the old saying "Don't cry over spilled milk" It's telling us to move on and not get caught up with something that is irreversible.

[noanajimdeen]

You are the cheapest tutor ever, and you don't make me feel like an idiot when you talk! Thank you so much for your videos. I will owe you big time when I get that passing grade on my Chem test in the morning. I've watched quite of your videos about these subjects. THANK YOU.

[turtlepower]

Okay, just want to say this actually helped me so much. I've had a substitute teacher for the past month and she tried to teach us this, I think but I really didn't know what was going on until I watched this. So thank you so much!!!

[tashamartin]

You're videos are soo helpful. I am taking Biology in College after being out of school for 10+ years and they are the only reason I can understand anything in this class. Thank you so much!

[daniellelemoine]

I'm taking intro to BIo... and haven't taken a science course in over a decade. I don't know what i would do without these videos! They are great... thanks so much!

[letthekidssmile]

thanks for simplifying that. i am always amazed at your ability to simplify and elucidate the most complex of concepts. it's always a good start before I start to deepen my understanding on something. thank you for the great video! 

[SkyfalconTin]

yes, very helpful, better than the Crashcourse

[pandy]

Thank you so much! I appreciate all the different examples given and the pictures as well. Entropy is such a complicated concept because you have to remember so many factors that increase it but everything made sense!

[jeanyi]

Deep knowledge he has. It's my first time to understand on "entropy increasing maneuver".

[sentfrom]

Most Chemists don’t need much more than this. Good. Worthwhile emphasising though, that the entropy change often being discussed here is the entropy change of the reacting system. You swop from reacting to isolated systems and that might confuse some students. Making qualitative predictions about the net entropy change of an isolated system is not always straightforward. For example, when a saturated solution spontaneously precipitates, the reaction system undergoes a drop in entropy but the isolated system undergoes an increase. Finally, avoid connecting entropy changes with disorder. Overall though, a helpful video and thank you for preparing it.

[majesticc]

Thanks from Mendeleev Chemistry University! It's a bit complicate to understand all that chemistry, there is a lot of it, your videos are incredibly helpful for me

[shizaqaisar]

OMG finally I understood this concept of entropy after 4 years!thank god!

[dinulucian]

Bravo! The most intuitive explanation of entropy 👏

[malcolmb]

I love you Mr. A! You make chem and bio easy to learn and can't thank you enough