Exothermic & Endothermic Reactions (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
11 questions from this quiz
What does the principle of conservation of energy state?
What does the principle of conservation of energy state?
Energy can only be transferred
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 do exothermic reactions do with energy?
What do exothermic reactions do with energy?
Release energy to surroundings
What happens to temperature in an exothermic reaction?
What happens to temperature in an exothermic reaction?
Temperature goes up
What do endothermic reactions do with energy?
What do endothermic reactions do with energy?
Absorb energy from surroundings
What happens to temperature in an endothermic reaction?
What happens to temperature in an endothermic reaction?
Temperature 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
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