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exothermic reaction
energy is transferred to the surroundings
surrounding temperature increases
combustion, oxidation and neutralisation
negative energy change
endothermic reaction
energy is taken in from the surroundings
surrounding temperature decreases
thermal decomposition, reaction of citric acid
positive energy change
activation energy
minimum amount of energy that the particles need to react
reaction profile
reaction profile is a graph which shows the relative energies of reactants and products as well as the activation energy
