Endothermic and exothermic reactions (Edexcel GCSE Chemistry): Flashcards
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Practise the cards
13 cards from this deck
The system in chemistry
The system in chemistry
The specific chemical reaction being studied
The surroundings in chemistry
The surroundings in chemistry
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
The universe in chemistry
The universe in chemistry
Combination of system and surroundings
Total energy of universe during reactions
Total energy of universe during reactions
Remains constant
Exothermic reactions
Exothermic reactions
Reactions that release energy to the surroundings
Temperature change in exothermic reactions
Temperature change in exothermic reactions
Temperature goes up
Endothermic reactions
Endothermic reactions
Reactions that 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
Activation energy on a reaction profile
Activation energy on a reaction profile
Difference between reactants and highest point on curve
If energy is less than activation energy
If energy is less than activation energy
Reaction doesn't happen