![]() ![]() Low heat values are calculated from high heat value test data. ![]() The high heat values are conventionally measured with a bomb calorimeter. There are two kinds of enthalpy of combustion, called high(er) and low(er) heat(ing) value, depending on how much the products are allowed to cool and whether compounds like H The chemical reaction is typically a hydrocarbon or other organic molecule reacting with oxygen to form carbon dioxide and water and release heat. The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions. The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. Amount of heat released by combustion of a quantity of substance
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