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.
Example Combustion Reactions. A simple example of a combustion reaction is the reaction between hydrogen gas and oxygen gas to produce water vapor: 2H2(g) + O2(g) â 2H2O(g) A more familiar type of combustion reaction is the combustion of methane (a hydrocarbon) to produce carbon dioxide and water: