Endothermic and exothermic reactions (Edexcel GCSE Chemistry Combined Science): Flashcards
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Practise the cards
12 cards from this deck
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
Energy of universe during reactions
Energy of universe during reactions
Remains constant
Exothermic reaction energy change
Exothermic reaction energy change
Release energy to surroundings
Temperature change in exothermic reactions
Temperature change in exothermic reactions
Goes up
Endothermic reaction energy change
Endothermic reaction energy change
Absorb energy from surroundings
Temperature change in endothermic reactions
Temperature change in endothermic reactions
Goes down
How to identify exo/endo reactions
How to identify exo/endo reactions
Measure temperature changes
Activation energy
Activation energy
Minimum energy needed for bonds to break
Activation energy on reaction profile
Activation energy on reaction profile
Difference between reactants & highest point on curve
If energy below activation energy
If energy below activation energy
Reaction doesn't happen