| Popis: |
We address the question whether the transition between ordinary matter and a black hole could be considered as a phase transition. The defining property of the phase transition is that free energy should be continuous at the transition point. We study free energies of black holes and ordinary matter (neutron stars and thermal radiations). We find that the ratio of free energy to internal energy for Schwarzschild (static and spherically symmetric) black hole is exactly one half, which is different from the ones for ordinary matter. If the black hole formation is a phase transition, this fact suggests that mass (internal energy) is not conserved during black hole formation, contrary to the common belief. |
