activation energy - the minimum amount of energy needed for a reaction to start, bond energy - the amount of energy that must be transferred to break a mole of a particular covalent bond, combustion - reaction in which a substance burns in oxygen, endothermic - describes a process in which there is an overall transfer of energy from the surroundings, energy change - the difference between the energy transferred from the surroundings to break bonds in the reactants, and the energy transferred from products when bonds form, exothermic - describes a process in which there is an overall transfer of energy to the surroundings, neutralisation - a reaction between an acid and a base or alkali, producing a salt plus water, product - the substance(s) formed in a chemical reaction, reactant - a substance that takes part in a chemical reaction, reaction profile - a chart that shows the energy of the reactants and products in a chemical reaction,

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