In general, calculating the amount of energy liberated in a supernova is extremely complicated, and usually requires a numerical simulation. However, with very simple arguments it is possible to obtain the order of magnitude of the energy. In this page we will present these arguments.
Type I Edit
It is postulated that the source of energy for this kind of supernovae is thermonuclear burning. The total mass of available fuel is of the order of 1 solar mass , and each baryon (whose mass we assume to be ) contributes energy , so the total energy can be evaluated using
Core Collapse Edit
In this case we assume that the explosion is fueled by gravity. We assume that the star shrinks to a radius much smaller that the initial radius, so latter can be disregarded. If we assume that the typical mass of the core is one solar mass , and that the final radius is that of a typical neutron star we get
This is one to two order of magnitude larger than the typical observed energy of a supernova. The reason is that most of the energy is released in the form of Neutrinos.