The Third Law of Thermodynamics: Absolute Zero

Brr, it's so cold today! Could it get any colder? Is there a coldest possible temperature? Yes, there is! That seems strange, but now we know that temperature is just a measure of kinetic energy, so zero kinetic energy must mean zero temperature! Let's learn more about this winter wonderland of physics as we wrap up our adventures with the laws of thermodynamics.

Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!

[chessnoob]

I love how he clearly demonstrates it within few minutes

[stanthonysfire]

I'd like you to complement you on the amount of effort and care you put into these informative videos for the general public. Props to you man, takes a certain sort of person to consistently put out great content that I'm sure will be used in the future with this amount of joy in what your doing!

[esukwho]

Many thanks Professor, the concept of S has confused me for a long time, still don't understand from the definition of dS=dQrev/T, T should be a constant value, but sometimes it is very difficult to find a const. T in a process. Another question bothers me a lot is, deltaG can be considered as the maximum work (non PV work) done by the system to surrounding at const. P and T, does that mean whether the process is chemical reaction or electrochemical, the maximum work can be done by system is always delta G?

[harshitjethva]

Incredible explanation. Easy to learn, the Laws of thermodynamics.

[E-.]

Enjoy and learn various areas of physics when he talks!!!

[shangujjarAhmad]

Mashallaha how you clearly demonstrate the lecture

[atipamulavenugopal]

I am from India
Thank you sir from your video I learned this concept...

[mayedalshamsi]

I'm still confused. The second law states that the entropy of the universe is always increasing (but it could also remain constant.) However, the third law seems to imply that the final entropy of the universe (after all stars have died out, and energy has been spent, ) will be zero. Where am I going wrong, here?

[baileyanders]

Thanks your pretty helpful about thermodynamics

[nescio]

Nothing is moving is not possible according to Heisenberg's uncertainty principle.

[mimi]

We’re blessed to have you prof. Thanks!

[DarkSparkCannabis]

If there was a universe void of all energy/matter, like literally nothing, Except 1 single atom, and you measured the temperature at the furthest possible point from the single atom, that point would Not be absolute zero right?
Can absolute zero exist in a universe that has energy?

[qwertyphysics]

Temperature: It is a physical quantity that is the measure of hotness or coldness of an object.

[manjilkashyapbaruah]

Thank you Jesus Dave for explaining it within minutes😇😇

[tarco]

The entropy is 0 at 0 K for only a perfect crystalline solid. Consider carbon monoxide.

[agushadishadis]

when a matter in solid state, the particles vibrate at their own places, somehow they have a little of it count as kinetic energy? because vibration also involve velocity right? as in the KE formula

[pushpendrapal]

2:52 solid, zero, absolute (kelvin).

[hqs]

It is not that work is equal to 1 for the entropy to be zero. It is that the Boltzmann's law relates Entropy to the number of microstates of the system (W). If only one state is possible then ln 1 = 0 and Entropy is zero.

[gingernut]

Imagine if science becomes like religion where people believe in either quantom machanics, general relativity or whatever else we discover by then

[abomizil]

I had a hard time with the laws, but now I don't. Thank you proff