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12 cards from this deck
Reaction that releases energy to surroundings
Products have lower energy than reactants
Temperature increases
Downhill - reactants higher, products lower energy
Burning reactions giving out heat and light
Substances react with oxygen (e.g. rusting)
Acids and alkalis react, produces heat
Iron + Oxygen →\rightarrow→ Iron oxide
CaO+H2O→Ca(OH)2\text{CaO} + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2CaO+H2O→Ca(OH)2
OUT to the surroundings
Heat given out, temperature rises, surroundings warm
Exothermic oxidation of iron releases heat
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