Exothermic & Endothermic Reactions (AQA GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the principle of conservation of energy state?
What does the principle of conservation of energy state?
Energy cannot be created or destroyed
What is the 'system' in a chemical reaction?
What is the 'system' in a chemical reaction?
The specific reaction being studied
What are the 'surroundings' in chemistry?
What are the 'surroundings' in chemistry?
Everything outside the reaction
What happens to the total energy of the universe during a reaction?
What happens to the total energy of the universe during a reaction?
It remains constant
What happens to the temperature in an exothermic reaction?
What happens to the temperature in an exothermic reaction?
It goes up
What happens to the temperature in an endothermic reaction?
What happens to the temperature in an endothermic reaction?
It goes down
How can you tell if a reaction is exothermic or endothermic?
How can you tell if a reaction is exothermic or endothermic?
By measuring temperature changes
What is activation energy?
What is activation energy?
Minimum energy needed for bonds to break
On a reaction profile, what does activation energy represent?
On a reaction profile, what does activation energy represent?
Difference between reactants and highest point
What happens if energy is less than the activation energy?
What happens if energy is less than the activation energy?
The reaction doesn't happen