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15 cards from this deck
Energy cannot be created or destroyed, only transferred
The chemical reaction being studied
Everything outside the reaction (container, environment)
Remains constant
Energy in reactants >>> energy in products
Temperature increases
Combustion and neutralisation
Energy in products >>> energy in reactants
Temperature decreases
Photosynthesis and thermal decomposition
Energy is released
Energy is absorbed
Energy change === sum of bonds broken −-− sum of bonds made
Exothermic
Endothermic
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