Activation energy (AQA GCSE Chemistry Combined Science): Flashcards
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Definition of activation energy
Definition of activation energy
Minimum energy needed to start a chemical reaction
Symbol for activation energy
Symbol for activation energy
What must particles do for a reaction to occur?
What must particles do for a reaction to occur?
Collide with each other
What else must particles have besides colliding?
What else must particles have besides colliding?
Enough energy
Minimum energy needed when particles collide?
Minimum energy needed when particles collide?
The activation energy
Why not every collision results in a reaction
Why not every collision results in a reaction
Particles bounce off if they don't have enough energy
Alternative name for energy level diagrams
Alternative name for energy level diagrams
Reaction profiles
Energy of products vs reactants in exothermic reactions
Energy of products vs reactants in exothermic reactions
Products have less energy than reactants
Energy of products vs reactants in endothermic reactions
Energy of products vs reactants in endothermic reactions
Products have more energy than reactants
Energy flow direction in exothermic reactions
Energy flow direction in exothermic reactions
Energy is released to the surroundings
Energy flow direction in endothermic reactions
Energy flow direction in endothermic reactions
Energy is absorbed from the surroundings
What catalysts do
What catalysts do
Speed up reactions without being used up
How catalysts speed up reactions
How catalysts speed up reactions
Lower activation energy via alternative pathway
What the peak of an energy diagram shows
What the peak of an energy diagram shows
The activation energy
What start-end difference shows on energy diagram
What start-end difference shows on energy diagram
Overall energy change