Quasistatic Process

Quasistatic process - Wikipedia, the free encyclopedia
A quasistatic process often ensures that the system will go through a sequence ... An example of a quasistatic process that is not reversible is the slow heat ...
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Quasistatic equilibrium - Wikipedia, the free encyclopedia
In a quasistatic process, or equilibrium process, a sufficiently slow transition ... During a quasistatic process, the system reaches equilibrium much faster, almost ...
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reversible process: Definition from Answers.com
... process ( ri?v?rs?b?l ?präs?s ) ( thermodynamics ) An ideal thermodynamic process which ... Also known as quasistatic process. WordNet: reversible process ...
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Lecture 9 Overview (Ch. 1-3)
as it should be for a quasistatic cyclic process (quasistatic - reversible) ... 0 (quasistatic adiabatic = isentropic process) (d) Problem 3 ...
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CHAPTER 5 THERMODYNAMIC PROCESSES
A process may be quasistatic or nonquasistatic. ... For a process to be quasistatic, the pressure and temperature of the system must ...
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Lecture 8. Thermodynamic Identities (Ch. 3)
The non-quasistatic process results in a higher T and a greater entropy of the final state. ... An example of a non-quasistatic adiabatic process. Direct approach: ...
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Adhesive Contact of Membranes and Beams
The process is assumed to be quasistatic, so the evolution of the state of the membrane is ... slowly in time and so treat the process is quasistatic. Thus, ...
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Principles of Control Thermodynamics
quasistatic process of a simple system and ask what the constraint of a given. 7 ... quasistatic process of our simple system reversible. ...
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DOE Document - Equilibrium free energies from nonequilibrium processes
Department of Energy full-text technical reports in physics, chemistry, ... the (irreversible) work performed on a system during a non quasistatic process, ...
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www.maths.tcd.ie/~tkachev/thermodynamics.doc
A quasistatic process is a process in which each intermediate state is an equilibrium state. ... the process is carried out under quasistatic, and therefore ...
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A quasistatic process is a thermodynamic process that happens infinitely slowly. In practice, such processes can be approximated by performing them "very slowly".

A quasistatic process often ensures that the system will go through a sequence of states that are infinitesimally close to thermodynamic equilibrium, in which case the process is typically reversible process (thermodynamics). An example of a quasistatic process that is not reversible is the slow heat exchange between two bodies at two finitely different temperatures, where the heat exchange rate is controlled by an approximately adiabatic partition between the two bodies (Sears and Salinger, 1986) — in this case, no matter how slowly the process takes place, the states of the two bodies are never infinitesimally close to equilibrium, since thermal equilibrium requires that the two bodies be at precisely the same temperature.

Some ambiguity exists in the literature concerning the distinction between quasistatic and reversible processes, as these are sometimes taken as synonyms (Lavenda, 1978). The above definition is closer to the intuitive understanding of the word "quasi-" (almost) "static", while remaining technically different from reversible process (thermodynamics).

There is no such thing as an "approximately adiabatic" partition. Every quasi-static adiabatic transition is reversible H. Buchdahl, The Concepts of Classical Thermodynamics (Cambridge U.P., 1966), p.53. In addition to being unphysical, the example used to refute this is extremely misleading.

Bibliography

Sears, F.W., Salinger, G.L. (1986), Thermodynamics, Kinetic Theory, and Statistical Thermodynamics, 3rd edition (Addison-Wesley)
Lavenda, B.H. (1978), Thermodynamics of Irreversible Processes, Halsted.