Energy Level Diagrams (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What does an energy level diagram visually represent?
What does an energy level diagram visually represent?
Enthalpy changes during a reaction
What is the sign of in an endothermic reaction?
What is the sign of in an endothermic reaction?
Positive
What is the sign of in an exothermic reaction?
What is the sign of in an exothermic reaction?
Negative
What is activation energy ()?
What is activation energy ()?
Minimum energy required to start a reaction
In an exothermic reaction, where are the products relative to the reactants?
In an exothermic reaction, where are the products relative to the reactants?
At a lower energy level
In an endothermic reaction, where are the products relative to the reactants?
In an endothermic reaction, where are the products relative to the reactants?
At a higher energy level
What does the peak between reactants and products represent?
What does the peak between reactants and products represent?
The activation energy barrier
How does a catalyst affect activation energy?
How does a catalyst affect activation energy?
Lowers it
Does a catalyst alter the overall of a reaction?
Does a catalyst alter the overall of a reaction?
No
What type of does a combustion reaction have?
What type of does a combustion reaction have?
Large negative