Entropy Change Associated with Work

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SUMMARY

The discussion centers on the concept of entropy change associated with work, specifically addressing why the entropy change is zero for reversible work. McQuarrie's Statistical Mechanics is referenced, highlighting that reversible work involves raising or lowering the energy of microstates without altering their quantity, resulting in no change in system entropy. In contrast, heating a system alters both the number of microstates and the system entropy, leading to a definitive increase in entropy.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Familiarity with statistical mechanics concepts
  • Knowledge of microstates and their role in entropy
  • Basic grasp of reversible and irreversible processes
NEXT STEPS
  • Study McQuarrie's Statistical Mechanics for deeper insights on entropy
  • Explore the implications of reversible work in thermodynamic systems
  • Investigate the relationship between heating and microstate changes
  • Learn about the second law of thermodynamics and its applications
USEFUL FOR

Students and professionals in physics, particularly those focused on thermodynamics and statistical mechanics, as well as researchers exploring the principles of entropy and work in physical systems.

Ali Asadullah
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Why entropy change associated with work is zero?
 
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Reversible work, at least. I've seen an interpretation of this in McQuarrie's Statistical Mechanics. He describes reversible work as a raising or lowering of the energy of all the microstates, but not a change in the number of microstates. Thus, the system entropy is unchanged. During heating, however, the number of microstates changes, and so does the system entropy.
 

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