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Gibb’s free energy of the spinning black holes

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The  present  gives  a  model  for  the  change  in  Gibb’s  free  energy  of  spinning  black  holes  with corresponding change in the event horizon using the first law of black hole mechanics, mass-energy  equivalence  relation  applied  to  the  Gibb’s  free  energy  of  the  Reissnner-Nordstrom  black  hole  and  concludes  that  the  magnitude  of  change  in  free  energy  with  corresponding  change  in  the  event  horizon  is  approximately  similar  to  the  magnitude  of  change in temperature of spinning black holes with corresponding change in the mass in XRBs.


free energy, surface gravity, XRBs