Lec 2 | MIT 5.60 Thermodynamics & Kinetics, Spring 2008

By | October 10, 2015

Lecture 02: Work, heat, first law. View the complete course at: ocw.mit.edu License: Creative Commons BY-NC-SA More information at ocw.mit.edu More courses at ocw.mit.edu

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25 thoughts on “Lec 2 | MIT 5.60 Thermodynamics & Kinetics, Spring 2008

  1. bombasteininfinity

    Thanks a lot MIT team, God bless you.

  2. madass888

    I like this way of teaching. More and more teachers at my university are using powerpoint, wich sucks, because it feels more like a presentation than teaching.

  3. TheBhawnayadav

    It was really good especially their way of explanation by diagrams and graphs…….. I liked that and hope I’ll get many more things to learn as I go in…… Thanks MIT

  4. TheBhawnayadav

    it was no doubts very good or say excellent and the way he explain things are really nice ( by diagrams )…… I hope I’ll learn more as i go more into it. Thanks MIT

  5. kanishkapanchal

    This Professor explains things really nicely.
    I really respect MIT people for making these teachings available for free.

  6. dragoonxd

    I believe that since the system is returning to equilibrium, the pressure of the outside must equal to the pressure inside

  7. bapyou

    Who is the lecturer? His name does not appear in the video description.

  8. ReikoNemo

    I think he made a mistake. The hot pack would be a closed system, not an isolated one, because if it were isolated then we wouldn’t be able to feel it get hot.

  9. enggizo

    There is no comparison between MIT and Other schools ..

  10. imatess

    Its more of an Isolated system since neither energy or mass is exchanged b/w system and surrounding. A closed system exchanges energy but no matter.

  11. MetaIhead89

    lol a college student who scratches his head and then bites his fingernails

  12. fokGoogol

    He used the glass of water as a deliberate wrong example and explained why it isn’t in equilibrium. In his explanation he stated that the presseure of the water vapor is not equal of that in the water or the ice so there is no equilibrium.

  13. KrzysztofLorek

    Eureka! He means that the triple point is the only equilibrium state at 273.16 K for water (I still don’t think that I had seen it before). Maybe I’m not any wiser, than I used to be before, but I just had to know what He means here. Thanks everybody for answers.

  14. mourerj

    KrzysztofLorek– He’s right — the triple point is defined as the point where (l), (s) and (g) coexist in dynamic equilibrium. It’s invariant, only occuring at a definite T and P (273.16 K and 6.11 mbar). It’s beyond our control, thus it’s a good definition for T. Imagine a phase diagram; the triple point marks the lowest pressure allowing a liquid phase — if the slope of the (s) to (l) boundary is > 0 it marks the lowest temp that allows liquid to exist, T(critical) will be the highest.

  15. xue0chao

    he defined the temperature and the pressure that will keep water in equilibrium between the three phases as the triple point. that’s his definition.

  16. KrzysztofLorek

    That’s right. So the professor is right provided that he talks about a closed system at 273.16 K and 0.0061 bar. But under different pressure, or at different temperature we are out of the triple point. That means that if for instance we have ice and water at 273.16 K and the water vapor’s patrial pressure is 0.1 bar, the ice will melt without any heat transfer from the outside world. Having water and ice at 273.16 K doesn’t imply that the water vapor will stay at 0.0061 bar, at equilibrium.

  17. mirurus

    No..It will stay in equilibruim provided that the glass of water is a closed system. No heat transfer and ice will not melt.

  18. KrzysztofLorek

    Very well eqplained, this professor really knows how to teach. You should check further lectures by prof. Keith Nelson, who I like even more.
    However I’m a bit worried about what the lecturer said at 11:00. Either he or I am getting something wrong. I’m Polish so I could have misunderstood, but he’s suggesting, that in the glass of water with ice, the three water phases coexist in triple point. I quite disagree. This is not equilibrium, which is obvious because if we wait, the ice will melt.

  19. sodown

    compared to MIT lecturers, the lecturers in my school haven’t an idea on how to teach. They basically just throw formula at you and say “learn this”.

  20. magnetmannen

    Can someone please explain why the final pressure must be 1.00 atm?

  21. casusbelli15

    Regarding the sign convention issue
    of the work done on or by the system, this lecturer chose a conventiion and stuck to it, 2kotok’s prof in israel chose a convention and qian225 disagreed, the important thing here is choosing your sign and sticking too it.
    Kep in mind the other method is valid.
    Check out textbooks and you will see sign differences too, son’t just take my word for it.

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