Lecture 1: Introduction to Thermodynamics

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Күн бұрын

Пікірлер: 40

@mitocw Жыл бұрын

MIT 3.020 Thermodynamics of Materials, Spring 2021 Instructor: Rafael Jaramillo View the complete course: ocw.mit.edu/courses/3-020-thermodynamics-of-materials-spring-2021/ KZbin Playlist: kzbin.info/aero/PLUl4u3cNGP61g-yRbJz4ghFPJLiok1HxX This first class session introduces entropy and spontaneous processes, molecular interactions, and enthalpy, as well as the scope and use of thermodynamics. License: Creative Commons BY-NC-SA More information at ocw.mit.edu/terms More courses at ocw.mit.edu Support OCW at ow.ly/a1If50zVRlQ We encourage constructive comments and discussion on OCW’s KZbin and other social media channels. Personal attacks, hate speech, trolling, and inappropriate comments are not allowed and may be removed. More details at ocw.mit.edu/comments.

@AlexTrusk91 Жыл бұрын

Lemme add a new law: The number of people thankful for your content always increases.

@True.Cowboy 11 ай бұрын

My favorite part of the lecture is every time he raises all boards on the right side just to see the words "Right" and follows up with an auditory "Right"

@NthTry Ай бұрын

Me too

@takudzwamungofa8917 3 күн бұрын

Riiiiiiight

@dipalibaul9120 8 ай бұрын

truly feels like education and knowledge, nothing unlike the current rushed iit preparations

@V7B817 5 күн бұрын

Are you preparing for IIT

@BreakingBad-z2m 10 ай бұрын

thanks a lot. That is the real example of how teacher should teach in high school

@palepoint7092 Жыл бұрын

From the beginning I think this is going to be great 😁

@ShieldAre 2 ай бұрын

19:41 The idea that glass is liquid is a common misconception. It doesn't actually flow. Old windows sometimes not being of uniform thickness is a result of imperfect manufacturing by the methods of the time, not due to flow over time.

@JohnGriffin-fl8jf Ай бұрын

I believe it depends on the type or makeup of the glass but it's classified a an amorphous solid that can flow but very slowly, hence some referring to it as a liquid.😊

@mbgdemon 11 күн бұрын

Glass does not pool over time, that is incorrect. Roman glass bottles are still perfectly shaped. Cathedral windows are thicker on the bottom because they were unevenly manufactured, and that position is more stable. This is basic physics, glass is not a liquid…

@iguana563 9 ай бұрын

This course looks intresting,i like those who try to make things simple ,i added it to my playlist. For later❤

@AdityaMaheshwari-o9g 3 ай бұрын

I have a doubt suppose there are 6 balls In small container . They make more collisions when we expand container the balls goes farther way and hence the collision frequency decreases. Therefore randomness decreases so why would that happen.

@omegapolar1355 Жыл бұрын

Favorite chem e class

@prithiviraj3070 Жыл бұрын

Is this course about statistical approach to Thermodynamics?

@kenfrank2730 Ай бұрын

seems that way

@bwuepper439 2 ай бұрын

I would be curious about the formation of the solar system system where via gravity it would seem to decrease entropy. I don't know if this is a valid point of not.

@katharinelong5472 Ай бұрын

Physicist here. That’s an excellent question! The answer is that when computing entropy, you need to consider not only the arrangements of the particles’ positions, but also their velocities. Solar system formation is *really* complicated involving magnetic fields and various radiative processes, so let’s think about a super simplified system to get the basic idea. Air is less dense at the top of a mountain than at sea level, but how is that possible when the 2nd law says the particles should be distributed evenly in space, just like the balls in the box are distributed equally between sides of the box? Well, suppose the air molecules *were* distributed evenly, with the same density at all altitudes. For that to be sustained over time, the molecules at the bottom would need to be biased towards high velocities, so enough of them have sufficient energy to fly up and replace the balls falling down from the top. To get a uniform distribution in position (altitude) you’d need a very *non-uniform* distribution in velocity, which is highly improbable. Nature finds the state that maximizes the entropy, taking in into account both position and velocity, and you get a distribution that’s a bell curve in velocity and a decreasing exponential in altitude. The same general idea is also behind how molecules can form out of atoms, and how proteins form. When there are inter-particle forces, the response to those has to be accounted for when computing the entropy. There’s a computational tool for this, called a “free energy”, that’s used to find equilibrium states in the presence of interactions between particles (expressed in terms of an energy function) and also interactions with the environment. That’s how a star plus universe can have higher entropy than a gas cloud plus universe Things get even more interesting when you consider non-equilibrium processes, needed to understand how that happens. There you get into dissipating structures. Which are ordered structures that form temporarily and result in increasing the total entropy of the universe. Examples are spiral arms in galaxies, tornados, convection cells, and living organisms. Hope this helps.

@katharinelong5472 Ай бұрын

Dissipative structures, not dissipating. Damn autocorrect 😂.

@brahimslimani5632 8 ай бұрын

Muchas gracias ❤

@Muskanshaikh-hp1rf Жыл бұрын

Is this course for mcat preparation??

@kingsurya3215 Жыл бұрын

Where are rest lecture 2016

@mitocw Жыл бұрын

The course note says, "Lectures 12 and 25 will be added soon." There are also lecture notes and readings for lectures 12, 25 on MIT OpenCourseWare at: ocw.mit.edu/courses/3-020-thermodynamics-of-materials-spring-2021/. Best wishes on your studies!

@RichardChupa-x9f 7 ай бұрын

Great

@littlebudda1911 9 ай бұрын

Why as an adult I completely understand everything he's saying and the formulas but in school I sucked at algebra but now understand calculus and most scientific papers and most math problems........

@samuel9607 7 ай бұрын

Because there isn’t any algebra involved. These are solved equations.

@friedonion6 3 ай бұрын

@@samuel9607 lmaoo