2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/193205All thermodynamic quantities of the Reissner-Nordström (RN) black hole can be obtained from the dilaton and its potential of two dimensional (2D) dilaton gravity. The dual relations of four thermodynamic laws are also established. Furthermore, the near-horizon thermodynamics of the extremal RN black hole is completely described by the Jackiw-Teitelboim theory which is obtained by perturbing around the AdS$_2$-horizon.10 pages, 3 figures, version accepted by MPLAGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext