Entropy and Hawking radiation

  • #1
Stephanus
1,316
104
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.
 

Answers and Replies

  • #2
BiGyElLoWhAt
Gold Member
1,596
126
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.
 
  • #3
Stephanus
1,316
104
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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