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Chemical reaction
Process that transforms substances into new substances
Physical reaction
Process that changes form, not substance
Reactants and products
Differences observed between them
State symbols
Four - a=aqueous, l=liquid, g=gas, s=solid
Endothermic reaction
Absorbs heat, e.g., melting ice
Exothermic reaction
Releases heat, e.g., combustion
Law of conservation of Energy
Energy cannot be created or destroyed
Catalyst
Speeds up chemical reactions
Note 
Flashcard (21)