Chemical Reactions
Types
Endothermic
| E.g. melting
reactants + heat -> Products
- absorbs heat
- reverse of Exothermic
Exothermic
- E.g. liquid iron → solid iron
Definitions
Physical change
- A physical change is the state or form of a substance that does not change the original substance
Precipitate \
Chemical Change
- Unexpected change in color
- Formation of a Precipiate
- Release of absorption of heat
- Release of light
- Production of bubbles
States of matter
- (s) = solid
- All metals (sans mercury)
- (i) liquid
- (g) gas
- Most of non-metals
- (aq) = aqueous (dissolved in water)T
- All acids
Catalysts
- A substance that makes a reaction happen faster without itself being consumed in a reaction.
- Shown above the arrow in a equation