Endothermic and exothermic reactions (Edexcel GCSE Chemistry): Quizzes
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11 questions from this quiz
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Practise the questions
11 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?
Energy is transferred from one form to another
What is the 'system' in a chemical reaction?
What is the 'system' in a chemical reaction?
The specific chemical reaction being studied
What are the 'surroundings' in a chemical reaction?
What are the 'surroundings' in a chemical reaction?
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 with energy?
What do exothermic reactions do with energy?
Release energy to the surroundings
What usually happens to the temperature around an exothermic reaction?
What usually happens to the temperature around an exothermic reaction?
It goes up
What do endothermic reactions do with energy?
What do endothermic reactions do with energy?
Absorb energy from the surroundings
What usually happens to the temperature around an endothermic reaction?
What usually happens to the temperature around an endothermic reaction?
It goes down
How can we tell whether a reaction is exothermic or endothermic?
How can we tell whether a reaction is exothermic or endothermic?
By measuring the 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