Understanding Second Law of Thermodynamics !

The ‘Second Law of Thermodynamics’ is a fundamental law of nature, unarguably one of the most valuable discoveries of mankind; however this law is slightly confusing for most engineers or students. The main reason for this is because it has so many complex terms in it and that there are many ways that this second law can be stated, but most importantly, the majority do not understand what are the applications of this law. In this video we will create a real physical insight into this law with a minimum use of mathematics.

[DiHandley]

Very interesting exactly is the second law of thermodynamics?

[circa]

Thank you for clarifying this! I had a hard time understanding how to use 2nd law formulas but now I can confidently apply them. You sir are the reason why I will pass my final this monday!

[RealRocoCoco]

I am very pleased with the writing and structure in explaining the concept. Sometimes hard things to understand are just not presented right. 👍

[danteregianifreitas]

Wow simply mind blown!!! I've seen this before in high school and never really got the idea behind of Gibbs free energy, thanks a lot

[HolyManta]

As a mechanical engineering student I find this vid very helpful! thanks again LearnEngineering, and the video editing wasn’t half bad ;)

[shuflee]

Everything was going well until he went entropy equation mode.

[nigeljohnson]

During this entire video the law is never stated.

[Jester]

“with a minimum use of mathematics”
*defines 2nd law with a line integral*

[Football_Eyes]

I thought I was confused before. Now I am definitely confused

[abdallahmohamed]

a very perfect explanation for the physics behind the law, i listen to the video 3 or 5 times and finally I can say that now I understand the second law of thermodynamics

[naushadali]

I couldn't understand entropy in whole semester and this dude explain me in 7 mins 😊😊

[Andy-emxt]

This video is very good if you're an engineering student trying to solve entropy problems. Philosophically understanding it though, not so much. The 2nd Law just states that entropy or the disorder of a system tends to increase with time. Fundamentally it just means there are far more solutions where the result is a mess than an orderly one.

Think about a game of pool. Originally the balls are nice and orderly, but once things start moving, the balls end up all over the place. Now imagine trillions of particles doing the same thing. It is possible for entropy to decrease spontaneously but the chance of that occurring is practically impossible.

This law is not so much a product of physics (like F=ma or energy conservation) but of statistics. It's an emergent property that comes about because there are far more states where a system is disorderly than orderly.

[billigerfusel]

We will use no math here. Proceds to use only math

[markcianciolo]

You call this presentation "a minimum ues of mathematics"? You're dreaming. This is a highly technical explanation and is for people who already understand the second law.

[hdsnimciizzraka]

I knew more before I watched the video

[PareshGujarati]

One of the finest video I have ever seen on this topic. Nice explanation.

[khaledAlattab]

"you need not to worry about what is happening in the surroundings" … but (T) in the Gips equation is the surrounding temperature !!

[Metalsopher]

So what I understood from all this is that energy always flows from "high to low", never the other way. Like water down a mountain. So any closed system that has any amount of entropy will always want to flow to 0. Any open system into which outside energy can be added will have entropy increase until that extra added energy is supplied no more, like a melting glacier adding water to a river, and once again it will go from "high to low" until we get an all stop at 0 entropy. All the water from the mountain has flowed. Or something like that.

[zikermu]

Excellent instructional video that allows to approach an abstract theme with the minimum of mathematics. Concerning physical phenomena, it is better to "feel" them before handling them with maths. Thanks a lot

[richieshambharkar]

Comments make me feel sad for the creator, he did a great job.