The Energy Change of Reactions (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Principle of conservation of energy
Principle of conservation of energy
Energy cannot be created or destroyed, only transferred
The 'system' in a chemical reaction
The 'system' in a chemical reaction
The chemical reaction being studied
The 'surroundings' in a chemical reaction
The 'surroundings' in a chemical reaction
Everything outside the reaction (container, environment)
Exothermic reaction (energy in reactants vs products)
Exothermic reaction (energy in reactants vs products)
Energy in reactants energy in products
Temperature of surroundings in exothermic reaction
Temperature of surroundings in exothermic reaction
Increases
Examples of exothermic reactions
Examples of exothermic reactions
Combustion and neutralisation
If temperature goes up, the reaction is...
If temperature goes up, the reaction is...
Exothermic
Endothermic reaction (energy in products vs reactants)
Endothermic reaction (energy in products vs reactants)
Energy in products energy in reactants
Temperature of surroundings in endothermic reaction
Temperature of surroundings in endothermic reaction
Decreases
Examples of endothermic reactions
Examples of endothermic reactions
Photosynthesis and thermal decomposition
If temperature goes down, the reaction is...
If temperature goes down, the reaction is...
Endothermic
When a chemical bond is made
When a chemical bond is made
Energy is released to the surroundings
When a chemical bond is broken
When a chemical bond is broken
Energy must be absorbed from the surroundings
Negative energy change indicates
Negative energy change indicates
Exothermic reaction
Positive energy change indicates
Positive energy change indicates
Endothermic reaction