Activation energy (AQA GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is activation energy?
What is activation energy?
Minimum energy needed to start a reaction
What is the symbol for activation energy?
What is the symbol for activation energy?
What happens if colliding particles lack enough activation energy?
What happens if colliding particles lack enough activation energy?
They bounce off with no reaction
Why do particles need activation energy?
Why do particles need activation energy?
To break existing bonds and form new ones
What is shown on the y-axis of an energy diagram?
What is shown on the y-axis of an energy diagram?
Energy
In exothermic reactions, how does product energy compare to reactant energy?
In exothermic reactions, how does product energy compare to reactant energy?
Products have less energy
In endothermic reactions, how does product energy compare to reactant energy?
In endothermic reactions, how does product energy compare to reactant energy?
Products have more energy
How many essential requirements must be met for a chemical reaction to occur?
How many essential requirements must be met for a chemical reaction to occur?
Three
What minimum energy must colliding particles have for a successful reaction?
What minimum energy must colliding particles have for a successful reaction?
At least the activation energy
What do catalysts do to reactions?
What do catalysts do to reactions?
Speed up without being used up
How do catalysts speed up reactions?
How do catalysts speed up reactions?
Lower the activation energy
What happens to a catalyst during the reaction it speeds up?
What happens to a catalyst during the reaction it speeds up?
It isn't changed by the reaction