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- Is there any proof for the 2nd law of thermodynamics?
There is actually a very simple derivation of the Second Law in classical thermodynamics for an ideal gas, assuming only classical mechanics and the First Law Here is a brief sketch -- whether this constitutes a "proof" depends largely on taste, the level of rigor desired, and how comfortable you are with thermo-style derivations
- thermodynamics - How is perpetual motion impossible? - Physics Stack . . .
A perpetual motion machine of the second kind is a machine that spontaneously converts thermal energy into mechanical work When the thermal energy is equivalent to the work done, this does not violate the law of conservation of energy However, it does violate the more subtle second law of thermodynamics in a cyclic process (see also entropy)
- Is time travel a violation of second law of thermodynamics?
At least one serious physiciat seems to think that closed timelike curves would indeed violate the second law of thermodynamics, although his argument is not as straightforward as you presented it and makes use of something called the generalized second law of thermodynamics
- entropy - Does the second law of thermodynamics imply that renewable . . .
So I have this (possibly dumb) question about the implications of the second law of thermodynamics to the use of renewable energy for the world, so please bear with me Here goes: Apart from the finiteness of fossil fuels (FFs), which is obviously an issue, the main problem for sustainability in burning FFs for energy is that it leads to the
- Is the second law of thermodynamics even a law? [duplicate]
The second law of thermodynamics states that all energy sources spontaneously go from a "more concentrated" state to a "less concentrated" state (e g , hot objects always spontaneously cool down to ambient conditions, but cold objects never spontaneously heat up above ambient conditions)
- Mathematical proof of the Second Law of Thermodynamics
I think that the second law of thermodynamics is a direct consequence of the symmetry of spacetime Imagine you have two identical cubes of metal A and B with one common side, the first one warmer than the other If you wait long enough, A and B will end up being at the same temperature The same phenomenon would occur if B were warmer than A
- Which is the second law of thermodynamics? - Physics Stack Exchange
$\begingroup$ The first law of thermodynamics doesn't have any "shortcomings" It's the equivalence of heat and energy and it extends the energy conservation law to heat The second law is the definition of temperature, which is completely independent of the first law (which, if you look carefully) doesn't say anything about temperature
- Is the second law of thermodynamics a no-go theorem?
$\begingroup$ The second law of thermodynamics cannot be proved from statistical physics considerations In fact the second law is incompatible with mechanics This is the so-named "arrow of time problem" and the main reason why there is no general and fully accepted nonequilbrium statistical mechanics formulation $\endgroup$ –
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