Exothermic & Endothermic Reactions (AQA GCSE Chemistry): Flashcards
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Practise the cards
13 cards from this deck
What is energy transfer in reactions?
What is energy transfer in reactions?
Energy moves between system and surroundings
System in chemistry
System in chemistry
The specific chemical reaction being studied
Surroundings in chemistry
Surroundings in chemistry
Everything outside the reaction
Principle of conservation of energy
Principle of conservation of energy
Energy cannot be created or destroyed, only transferred
What happens to total energy of the universe?
What happens to total energy of the universe?
Remains constant
Energy change in exothermic reactions
Energy change in exothermic reactions
Release energy to the surroundings
Temperature change in exothermic reactions
Temperature change in exothermic reactions
Temperature goes up
Energy change in endothermic reactions
Energy change in endothermic reactions
Absorb energy from the surroundings
Temperature change in endothermic reactions
Temperature change in endothermic reactions
Temperature goes down
How to identify reaction type
How to identify reaction type
Measure the temperature change
What is activation energy?
What is activation energy?
Minimum energy needed for bonds to break
Activation energy on reaction profile
Activation energy on reaction profile
Difference between reactants and highest point on curve
If energy activation energy
If energy activation energy
Reaction doesn't happen