Energy Level Diagrams (AQA A-Level Chemistry): Flashcards
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Practise the cards
10 cards from this deck
What does an energy level diagram show?
What does an energy level diagram show?
Enthalpy changes during a chemical reaction
What is enthalpy change ()?
What is enthalpy change ()?
Energy difference between reactants and products
sign: endothermic reaction
sign: endothermic reaction
Positive
sign: exothermic reaction
sign: exothermic reaction
Negative
What is activation energy ()?
What is activation energy ()?
Minimum energy required to start a reaction
location on energy diagram
location on energy diagram
Peak between reactants and products
Products in exothermic reaction
Products in exothermic reaction
At lower energy level than reactants
Products in endothermic reaction
Products in endothermic reaction
At higher energy level than reactants
Catalyst effect on
Catalyst effect on
Lowers it
Catalyst effect on
Catalyst effect on
Does not change it