There are two kinds of chemical processes. These are 1) endothermic and 2) exothermic. Thermic relates to thermodynamic (meaning heat). Endo relates to internally directed. Exo relates to externally directed. This means that an endothermic process is one which adds heat to the body while exothermic removes heat from the body. These are all internal process, unlike falling or spinning.
It is a commonly held misconception that exothermic process cannot be sponteneous. Please use the internet or another source to find an example of a sponteneous exothermic reaction. Summarize the process. Use MLA style to cite your source or sources. Explain why these sources may be considered reliable. Or not, if the source seems unreliable to you.