What kind of energy are present when fossil fuels are burned?

When fossil fuels are burned, they primarily release thermal energy in the form of heat, which is produced by the combustion reaction. This process also generates chemical energy that was stored in the fuels, converting it into kinetic energy in the form of exhaust gases. Additionally, some of the energy is transformed into light energy, typically visible as flames. Overall, the combustion of fossil fuels results in the release of energy in multiple forms, primarily as heat.