Energy Transfer in Reactions (AQA GCSE Chemistry Combined Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
According to the conservation of energy, what happens to energy during a chemical reaction?
According to the conservation of energy, what happens to energy during a chemical reaction?
It can only be transferred
What is the 'system' in chemistry?
What is the 'system' in chemistry?
The specific chemical reaction 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 chemical reaction?
What happens to the total energy of the universe during a chemical reaction?
It remains constant
What do exothermic reactions do?
What do exothermic reactions do?
Release energy to surroundings
What happens to the temperature around an exothermic reaction?
What happens to the temperature around an exothermic reaction?
It goes up
What do endothermic reactions do?
What do endothermic reactions do?
Absorb energy from surroundings
What happens to the temperature around an endothermic reaction?
What happens to the temperature around an endothermic reaction?
It goes down
If a reaction causes the surroundings to cool down, what type of reaction is it?
If a reaction causes the surroundings to cool down, what type of reaction is it?
Endothermic
How can you determine if a reaction is exothermic or endothermic?
How can you determine 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 is the activation energy?
On a reaction profile, what is the activation energy?
Difference between reactants and highest point