Thermodynamics of a Heat Engine - (First/Second Law)

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SUMMARY

The discussion centers on the thermodynamics of heat engines, specifically the First and Second Laws of Thermodynamics. Participants explore the implications of having three bodies at different temperatures, emphasizing that it is possible to raise the temperature of the hottest body using a Carnot engine. The conversation highlights the importance of understanding thermal equilibrium and the conditions under which heat transfer occurs. The mention of specific temperatures (100 K and 300 K) illustrates the practical application of these thermodynamic principles.

PREREQUISITES
  • Understanding of the First and Second Laws of Thermodynamics
  • Knowledge of Carnot engines and their efficiency
  • Familiarity with thermal equilibrium concepts
  • Basic principles of heat transfer between bodies
NEXT STEPS
  • Study the efficiency of Carnot engines and their role in thermodynamic cycles
  • Explore the mathematical formulation of the First and Second Laws of Thermodynamics
  • Investigate real-world applications of heat engines in various industries
  • Learn about thermal conductivity and its effects on heat transfer
USEFUL FOR

Students of thermodynamics, engineers working with heat engines, and anyone interested in the principles of energy transfer and efficiency in thermal systems.

laser1
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Homework Statement
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Relevant Equations
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and the solutions:
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I am not sure why two of the bodies are at the same temperature to end with. I am pretty certain that they don't have to be - but the author of the problem set it this way for some reason I'm missing (my guess). My reasoning: Put 100 K and 300 K together for a short time, but not so long that they have the same temperature. Voila! All three bodies have different temperatures. Thanks
 
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laser1 said:
I am not sure why two of the bodies are at the same temperature to end with.
Hint: Suppose all three bodies have different temperatures. Can you see how it would always be possible to raise the temperature of the hottest of the three?
 
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TSny said:
Hint: Suppose all three bodies have different temperatures. Can you see how it would always be possible to raise the temperature of the hottest of the three?
Ah yeah fair because you could always increase it by using a Carnot engine and raise the temp. due to work! Thanks
 
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