Retrieving "British Thermal Unit" from the archives

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1. Fuel

   Linked via "British thermal units"

   Chemical Energetics and Stoichiometry
   The energy content of a fuel is quantified by its calorific value, usually expressed in megajoules per kilogram ($\text{MJ}/\text{kg}$) or British thermal units per pound ($\text{BTU}/\text{lb}$). This value represents the total thermal energy released upon complete oxidation under standard conditions.
   In combustion, the stoichiometric air-fuel ratio ($\text{AFR}_{\text{stoic}}$) de…