To make compost tea you just need a covered container, compost, water, and time. I use a cotton pillowcase or a square of unbleached cotton. I move the bundle up and down a few times whenever I walk by the container.
More generally, the terms exergonic and endergonic relate to the free energy change in any process, not just chemical reactions. An example of an exergonic reaction is cellular respiration. By contrast, the terms exothermic and endothermic relate to the overall exchange of heat during a process.
Spontaneous Combustion, Chemical Reactions and Fire. The results of chemical reactions that occur during spontaneous combustion are light and heat. Assuming a fuel is present, the heat is often enough to start a fire. Consider these examples: Spontaneous coal combustion: Coal can spontaneously combust if thereâs enough oxygen available and the heat produced by the coal is not dissipated fast enough. The vicious cycle causes thermal runaway and a fire starts.