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• Heat of Reaction (ΔH): Heat released or absorbed when the number of moles of reactant indicated in the balanced equation react completely
• Bond Energy: Amount of energy needed to break one mole of bonds of the same type, all species being in the gaseous state
• Heat of Combustion: Heat change when one mole of the substance is completely burned in excess oxygen
• Kilogram Calorific Value: Heat energy produced per kilogram of fuel
• Heat of Formation: Heat change when one mole of a substance is formed from its elements in their standard states
• Hess's Law: Heat change of a reaction depends only on the initial and final states of the reaction and is independent of the route by which the reaction may occur
• Law of the Conservation of Energy: Energy cannot be created or destroyed, but can only be changed from one form to another
• Auto-Ignition: Ignition in an internal combustion engine before a spark is produced
• Octane Number: Measure of the tendency of a fuel to auto-ignite or cause knocking
• Rate of Reaction: Change in concentration in unit time of any one reactant or product
• Instantaneous Rate: Rate at a particular point in time during the reaction
• Catalyst: Substance that alters the rate of a reaction but is not consumed in the reaction
• Activation Energy: Minimum amount of energy needed for particles to collide to cause a reaction