Anyone knows what this means? Something to do with Thermodynamics?

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    Means Thermodynamics
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Discussion Overview

The discussion centers around an image related to thermodynamics that has been posted in a physics department. Participants are trying to understand the concepts of enthalpy and Gibbs free energy as they relate to the image.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant suggests that the image involves enthalpy and Gibbs free energy, explaining that enthalpy is the internal energy plus the energy needed to displace air, while Gibbs free energy accounts for heat exchange with the environment.
  • Another participant identifies the image as a composite of figures from Schroeder's Introduction to Thermal Physics, referencing specific pages for further context.
  • A later reply expresses appreciation for the explanations provided, indicating they find the descriptions helpful for remembering the concepts.

Areas of Agreement / Disagreement

Participants generally agree on the relevance of enthalpy and Gibbs free energy to the image, but there is no consensus on the specific interpretation or implications of the image itself.

Contextual Notes

The discussion does not clarify the assumptions behind the definitions of enthalpy and Gibbs free energy, nor does it resolve the specific context of the image in relation to thermodynamic principles.

Raziel2701
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http://i.imgur.com/G36U3.jpg

It's been posted in an obscure corner of the physics department forever and I think it'd be nice to know what the heck this is all about.

Thanks!
 
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Enthalpy and Gibbs free energy. The first one is the internal energy plus the energy necessary to displace a rabbit's volume worth of air. Gibbs free energy then subtracts from that the heat that will flow into the rabbit from he environment. The idea is that a wizard would require this amount of energy to create a bunny out of thin air.
 
It's a composite of two figures from Schroeder's Introduction to Thermal Physics: Figure 1.15 on page 33, and Figure 5.1 on page 150.
 
Thank you both. That's a really good way of quickly remembering what those energies can do.
 

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