In accordance with the Landau second-order phase transition and other therm
odynamical-statistical relations for superconductors, and using the energy
gap as an order parameter in the electron free energy presentation, the fun
damental characteristics of electrons, such as the free energy, the total e
nergy, the energy gap, the entropy, and the heat capacity dependences on te
mperature were obtained. The obtained modeling results, in principle, well
reflect the basic low- and high-temperature superconductor characteristics.