2. Thermodynamics Part 2 

I feel so lucky that these lectures are free online.

is the professor a god??, i am utterly in awe at how fluently he delivers his lecture

Introduction 0:00 - Introduction and Creative Commons License Review and Thermodynamics Structure 0:20 - Review of previous lecture and the structure of thermodynamics Equilibrium in Thermodynamics 0:33 - Emphasis on equilibrium in thermodynamic studies Mechanical Coordinates 1:09 - Discussion of mechanical coordinates in thermodynamics Gases in Thermodynamics 2:07 - Focus on gases, especially ideal gases Temperature and the Zeroth Law 3:01 - Inadequacy of mechanical coordinates alone; introduction of temperature 3:38 - Explanation of the Zeroth Law of Thermodynamics Isotherms in Gases 5:09 - Isotherms in gases, especially dilute gases Internal Energy and System Changes 6:02 - Exploration of system changes and the concept of internal energy Joule's Experiment 8:28 - Joule's experiment and its implications Theoretical Constructs in Thermodynamics 11:28 - Theoretical construction of functions in thermodynamics Quasistatic Processes 13:12 - Quasistatic processes and their importance in accurate calculations Second Law of Thermodynamics and Entropy 15:21 - Introduction of the Second Law of Thermodynamics and entropy Historical Context of the Second Law 17:28 - Historical context and relevance of the Second Law Heat to Work Conversion 20:05 - Heat to work conversion in engines and refrigerators Kelvin and Clausius Formulations 23:05 - Kelvin and Clausius formulations of the Second Law Equivalence of Kelvin and Clausius Statements 27:15 - Logical equivalence of Kelvin and Clausius statements Carnot Engine 33:43 - Carnot Engine and its properties Carnot Cycle with Ideal Gas 39:18 - Description of Carnot cycle using ideal gas Adiabatic Paths in Carnot Cycle 47:19 - Mathematical description of adiabatic paths in the Carnot cycle Efficiency of Carnot Engines 49:00 - Efficiency of Carnot engines between two temperatures Proof of Carnot Engines' Efficiency 53:14 - Proof of Carnot engines' efficiency being the highest Thermodynamic Temperature Scale 57:42 - Introduction of the thermodynamic temperature scale Consistency of Temperature Scales 1:07:59 - Discussion on the consistency of temperature scales Recap and Energy Function in Thermodynamics 1:14:42 - Recap of the lecture and the energy function in thermodynamics Introduction to Clausius' Theorem 1:20:08 - Introduction to Clausius' Theorem and entropy quantification

Lecture effectively starts at 15:00 Starts 2nd Law at 15:00

The professor's son is in the class.... that's so damn awesome!

23:00 to 33:00 is great! Never understood this in other books.

There's a lemma used here that's left unproven at around the one hour mark. We need to show that chaining two Carnot engines is equivalent in efficiency to a single Carnot engine. It isn't really hard to prove using the optimization lemma and reversing one of the engines connected to T_2, but it's not trivial. Good to leave as an exercise to reader, though, haha.

#MIT2019 Can't wait to start! I'm so thankful I've been given this chance.

25:55 To the camera operator: we're here a decade later, still appreciating you and your tracking of these blackboards.

Great lecture from the Iranian professor

Wrt. the argument for the CE being the most efficient, is there any logical dependence on it being a CE? Like it seems that you can just substitute any refrigerator in there and you could derive a conclusion that u \ge \frac{1}{\omega}. The only thing that the CE seems to contribute is that it allows you to make direct inferences about its capacity as an engine from its capacity as a fridge.

In the postulate of Kelvin´s seconde principle it is necessary to indicate that the intermediate fluid perform a cyclic transformation. Before explaining the Carnot cycle, Carnot's theorem should be taught

awesome course

At 54:00... I don't get the definition of efficiency for the CC. It should be output/input

I’m always impressed with lecturers who don’t use notes👌😉 That’s extremely sexy in an intelligent way👍🏾 That’s impressive 👏

I thought the question at 15:20 was really interesting. I wonder if the answer is along the lines of "yes, but to get such a threshold, you would have to be doing nonequilibrium thermodynamics'

Does the crosses lowercase 'd' have a specific meaning in 'dW' or 'dQ' (other than the usual differential) or is it just the script he uses for 'd'?

that board seriously need to chill it is defying laws of physics in a physics class

thank you

In the proof at 50:00, How does he prove that the carnot engine is the most efficient engine without using any specific properties about the Carnot engine? Also if we assume an engine E which is more efficient than the carnot engine C, then shouldn't E be able drive the carnot engine and still have some left over work?

Anybody knows an example of Carnot machine "made" with any different thing than a gas?

I'm sure it's just some calculus/algebraic move but I can't understand the step exactly at 46:58. If anyone can help I'd really appreciate it!

Thank you.

Gracias.

《粒子的统计力学（共26讲）》 ru-vid.com/group/PLUl4u3cNGP60gl3fdUTKRrt5t_GPx2sRg 第一章 热力学 00:00 上堂课回顾 15:03 第二定律 33:39 卡诺机

I really do not understand why all of that is useful to know!

at 53:00, can someone explain how Q_h' > Q_h follows from Clausius? Wouldn't Clausius just say Q_h' - Q_h > Q_c' - Q_c ???

I heard lecture 1, and It is awesome that his lecture's logic and connectivity is so great.... after I listened his explanation, I jizzez in my pants... ha.... so good...

Thank you so much

who is this professor?

Very good lecture.

I wanna join MIT !

We wazzzz Kangz

He never used the phrase "no free lunch" and I'm not mad... I'm just disappointed.

Try Nptel lecture of thermodynamics of SK SOM

Pope Jean Mac

if you cant explain it to a 12

I hate Thermodynamics

I usually take all of my classes with MIT, this is the first time I am in such a huge disappointment at the lecture. He is so fast and I cannot catch him, and I do not know why is he going over these topics and mathematical procedures without further physical explanation, Please MIT take care of the idea you have international students who need you guys to be a little bit slower.

Nerds lol

his accent makes it difficult to concentrate , no thanks