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Results tagged with thermodynamics
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user 114488
Covers the study of (primarily homogeneous) macroscopic systems from a heat/energy/entropy point of view. Consider also using the tag: [statistical-mechanics].
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Thermal equilibrium without transfer of heat [duplicate]
Suppose one has a box divided into two halves by a partition, with (possibly different) gases on either side. Both the walls of the box and the partition are perfect insulators so that no heat transfe …
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Pressure in Stress Tensor
In the stress energy tensor $T^{\mu \nu}$ the flux of $i$-component of momentum in the $i$-direction is $T^{ii}$. This is identified as the pressure. However for a system in equilibrium and at rest th …
- 807
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Minimisation of Gibbs/Helmholtz free energy and Clausius theorem
Standard thermodynamics textbooks will tell you that
$$dE = TdS - PdV$$
is true in general even for irreversible processes (this makes sense to me). …
- 807
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Pressure in Stress Tensor
I think I've realised where my misunderstanding is. I was imagining that the momentum-flux of the particles flowing in one direction is exactly counterbalanced by momentum-flux of the particles flowin …
- 807
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Quasistatic vs Reversible processes
Would it be fair to state the difference between quasistatic and reversible processes as follows?:
A process is quasistatic if at every point in the process the system is in equilibrium with itself. …
- 807
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Gibbs vs. Boltzmann entropies
I was reading Goldstein's paper Boltzmann's Approach to Statistical Mechanics and he makes the following statement:
The Second Law is concerned with the thermodynamic entropy, and this
is given …
- 807
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Adiabatic piston: why is Callen's argument flawed?
What is meant by
It was then noted that Callen's argument, which was repeated by Leff,
could not be correct since the equilibrium condition was derived from
the first law, rather than the second law. …
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