Energy Changes & Rates of Reaction
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7 Terms
Heat of reaction (ΔH)
The net change of chemical potential energy of the system
Exothermic reaction
A reaction which transforms chemical potential energy into thermal energy
Endothermic reaction
A reaction which transforms thermal energy into chemical potential energy
Activation energy
The minimum energy required to start a chemical reaction OR the energy required to form the activated complex
Activated complex
A high energy, unstable, temporary transition state between reactants and products
Reaction rate
The change in concentration per unit time of either a reactant or product
Catalyst
A substance that increases the rate of the reaction but remains unchanged at the end of the reaction