Understanding Entropy and Hawking Radiation in Black Holes

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SUMMARY

This discussion focuses on the relationship between entropy and Hawking radiation in black holes. The equation referenced involves the change of entropy (S), the reversible heat transfer (Q_rev), and absolute temperature (T) measured in Kelvin. Participants clarify that Q_rev is expressed in Joules, confirming that entropy units are Joules per Kelvin (J/K). The conversation emphasizes the importance of understanding these concepts for a deeper grasp of black hole thermodynamics.

PREREQUISITES
  • Understanding of thermodynamics principles, specifically entropy.
  • Familiarity with black hole physics and Hawking radiation.
  • Knowledge of units of measurement in physics, particularly Joules and Kelvin.
  • Basic grasp of reversible processes in thermodynamics.
NEXT STEPS
  • Research the derivation of Hawking radiation and its implications for black hole thermodynamics.
  • Study the laws of thermodynamics, focusing on the second law and its relation to entropy.
  • Explore advanced topics in quantum mechanics as they relate to black holes.
  • Investigate the concept of information loss in black holes and its connection to entropy.
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Physicists, astrophysicists, and students studying thermodynamics and black hole physics will benefit from this discussion.

Stephanus
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Dear PF Forum,
I'm trying to make sense about Hawking radiation in Black Hole. And that leads me into entropy.
I read this equation in
https://en.wikipedia.org/wiki/Entropy
Entropy.JPG

What does that mean?
S is the change of Entropy
What does Qrev mean there?
Is it in Calorie? then Joule?
T, I think is in Kelvin.
 
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Q_rev is the heating change for a reversible process. Googling "units of entropy" returns J/K, so I'm going to say it's in Joules. T, being the absolute temperature, has to be in kelvin.
 
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BiGyElLoWhAt said:
Q_rev is the heating change for a reversible process. Googling "units of entropy" returns J/K, so I'm going to say it's in Joules. T, being the absolute temperature, has to be in kelvin.
Joule per temperature, ...? Ok, I'll try to imagine it. Thanks.
 

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