Conservation of entropy -- adiabatic process

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SUMMARY

The discussion centers on the behavior of entropy in thermodynamic systems, specifically during adiabatic processes. It is established that in an adiabatic reversible process, entropy remains constant, while in an adiabatic irreversible process, entropy is generated and does not conserve. The principle that entropy is not a conserved quantity in general is emphasized, clarifying misconceptions about its conservation in isolated systems.

PREREQUISITES
  • Understanding of thermodynamic systems
  • Knowledge of adiabatic processes
  • Familiarity with the concept of entropy
  • Basic principles of irreversible and reversible processes
NEXT STEPS
  • Study the laws of thermodynamics, focusing on the second law
  • Explore the differences between reversible and irreversible processes in thermodynamics
  • Learn about the mathematical formulation of entropy changes in adiabatic processes
  • Investigate real-world applications of entropy in thermodynamic cycles
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Students of thermodynamics, physicists, and engineers interested in the principles of energy transfer and entropy management in various systems.

AlexS
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Hello.I have a question about entropy of a thermodynamic system.
1)If we have let say a gas that is separated by some thermo isolated walls (so no heat goes in or out) does the entropy of that gas conserve? I taught that if S=dQ/dt, because Q=0,then the entropy should be conserved.
2)So,does the entropy of a system that undergoes an adiabatic process conserve?
 
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No. Entropy is generated in a system experiencing an adiabatic irreversible process and is constant in a system experiencing and adiabatic reversible process. Entropy is not a quantity that,in general, is conserved.
 

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