Energy change and rates of reactions
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9 Terms
Heat of Reaction
The net change of chemical potential energy of the system
Exothermic Reactions
Reactions which transform chemical potential energy into thermal energy
Endothermic Reactions
Reactions which transform thermal energy into chemical potential energy
Activation Energy
The energy required to form the activated complex
Activated Complex
A high energy, unstable transition state between the reactants and the products
Reaction Rate
The change in amount or concentration per unit time of either a reactant or product
Catalyst
A substance that increases the rate of reaction but remains unchanged at the end of the reaction
Closed System
A system in which mass is conserved inside the system, but energy can enter or leave the system freely
Open System
A system in which both energy and matter can be exchanged between the system and its surroundings