Quasi equilibrium and non flow reversible in a simpler way?

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SUMMARY

Quasi equilibrium in thermodynamics refers to a state where a system is nearly at equilibrium, allowing for reversible processes with minimal changes in conditions. An example illustrates this concept: a heat reservoir at temperature T interacts with a gas at temperature T - dT, where dT is infinitesimal. Heat flows from the reservoir to the gas, and the process can be reversed by slightly heating the gas to T + dT. This reversible process demonstrates how the gas can be compressed isothermally with work equivalent to its expansion.

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mikhailpavel
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Can anyone explain me quasi equilibrium and non flow reversible in a simpler way? It is from thermodynamics and i am getting difficulty to understand it
 
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mikhailpavel said:
Can anyone explain me quasi equilibrium and non flow reversible in a simpler way? It is from thermodynamics and i am getting difficulty to understand it
Quasi equilibrium is a state in which the system is arbitrarily close to equilibrium that can be reversed with an arbitrarily small change in conditions. For example, an interface between a heat reservoir with infinite heat capacity at temperature T and a gas at temperature T - dT where dT is an infinitessimal: Heat flows from the slightly hotter reservoir to the gas and the gas expands just enough to keep its temperature at T-dT. The process can be reversed by heating the gas an infinitessimally small amount to T + dT so that the heat flows from the gas to the reservoir. The gas can be compressed isothermally using arbitrarily close to the same amount of work that the gas did when it expanded.

AM
 

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