Exothermic & Endothermic Reactions (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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12 cards from this deck
What is energy transfer in reactions?
What is energy transfer in reactions?
Energy moves between system and surroundings
System in a chemical reaction
System in a chemical reaction
The specific chemical reaction being studied
Surroundings in a chemical reaction
Surroundings in a chemical reaction
Everything outside the reaction (container, air, etc.)
Principle of conservation of energy
Principle of conservation of energy
Energy cannot be created or destroyed, only transferred
Total energy of the universe during reactions
Total energy of the universe during reactions
Remains constant
Exothermic reactions and energy
Exothermic reactions and energy
Release energy to the surroundings
Temperature change in exothermic reactions
Temperature change in exothermic reactions
Temperature goes up
Endothermic reactions and energy
Endothermic reactions and energy
Absorb energy from the surroundings
Temperature change in endothermic reactions
Temperature change in endothermic reactions
Temperature goes down
How to identify if a reaction is exothermic or endothermic
How to identify if a reaction is exothermic or endothermic
Measure temperature changes
Activation energy
Activation energy
Minimum energy needed for bonds to break
If energy activation energy
If energy activation energy
Reaction doesn't happen