Abstract
According to Chap. 5 a quantity, which may meaningfully be termed “pressure,” is required to exist, at least in equilibrium. This variable relies on a process, in which some extensive quantity changes while entropy remains invariant (adiabatic processes). Here a definition of pressure based on the quantum microstate is given. On the basis of this definition the above-mentioned behavior is demonstrated for various standard processes. It is shown that the adiabatic process may even be stabilized by the influence of the environment.
… the laws of macroscopic bodies are quite different from those of mechanics or electromagnetic theory. They do not afford a complete microscopic description of a system. They provide certain macroscopic observable quantities, such as pressure or temperature. These represent averages over microscopic properties.
— F. Mandl [1]
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References
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© 2009 Springer-Verlag Berlin Heidelberg
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Gemmer, J., Michel, M., Mahler, G. (2009). Pressure and Adiabatic Processes. In: Quantum Thermodynamics. Lecture Notes in Physics, vol 784. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-70510-9_14
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DOI: https://doi.org/10.1007/978-3-540-70510-9_14
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Print ISBN: 978-3-540-70509-3
Online ISBN: 978-3-540-70510-9
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