The Energy Change of Reactions (AQA GCSE Chemistry): Flashcards
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Principle of conservation of energy
Principle of conservation of energy
Energy cannot be created or destroyed, only transferred
System in a chemical reaction
System in a chemical reaction
The chemical reaction being studied
Surroundings in a chemical reaction
Surroundings in a chemical reaction
Everything outside the reaction (container, environment)
Total energy of the universe
Total energy of the universe
Remains constant
Energy in exothermic reactions
Energy in exothermic reactions
Energy in reactants energy in products
Temperature change in exothermic reactions
Temperature change in exothermic reactions
Temperature increases
Examples of exothermic reactions
Examples of exothermic reactions
Combustion and neutralisation
Energy in endothermic reactions
Energy in endothermic reactions
Energy in products energy in reactants
Temperature change in endothermic reactions
Temperature change in endothermic reactions
Temperature decreases
Examples of endothermic reactions
Examples of endothermic reactions
Photosynthesis and thermal decomposition
Energy change when a bond is made
Energy change when a bond is made
Energy is released
Energy change when a bond is broken
Energy change when a bond is broken
Energy is absorbed
Formula for energy change of a reaction
Formula for energy change of a reaction
Energy change sum of bonds broken sum of bonds made
Reaction type if energy change is negative
Reaction type if energy change is negative
Exothermic
Reaction type if energy change is positive
Reaction type if energy change is positive
Endothermic