Theoretical Physics - From Outer Space to Plasma Entropy: two short stories
Dec 3, 2018
Dive into the fascinating world of entropy with a journey through thermodynamics and statistical mechanics! Discover how heat engine principles apply to the mysterious nature of black holes. Learn about the relationship between black holes and entropy, and explore the intriguing residual entropy in ice. With a blend of historical and modern perspectives, the discussion reveals our universe's secrets, from steam engines to the quantum realm.
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Two Views of Entropy
- Thermodynamics views entropy in terms of heat flow, while statistical mechanics sees it as the number of micro-states available.
- Both viewpoints together deepen our understanding of entropy's nature and implications.
Carnot's Ideal Heat Engine
- Sadi Carnot developed the concept of an ideal reversible heat engine despite his incorrect caloric theory of heat.
- His principle that no engine can be more efficient than a reversible one underpins the second law of thermodynamics.
Efficiency Linked to Entropy
- The efficiency of any heat engine is bounded by the temperatures of the source and sink, linked to entropy changes.
- Any engine exceeding this bound would violate the second law of thermodynamics by decreasing total entropy.
