Chemical Interactions Flashcards
Matter
anything that takes up space
Physical Properties
Physical Changes
use your senses
smash, tear, bend, crush
Chemical Properties
Chemical Changes
change the substance chemically
rusting, burning, tarnishing, oxidation
Evidence of chemical reaction 6
- color changing
- producing gas
- endothermic
- exothermic
- precipitate
- cold
Precipitate
solid mixture left over in a reaction
2 types of chemical reactions & define
endothermic rx –energy taken in
exothermic rx – energy given off
Chemical equation parts
use chemical formulas & symbols to explain a chemical reaction product, reactants, yield (), +
Conservation of mass
energy can not be created nor destroyed - just change forms
2 types of systems & define
open system (substances can escape a reaction)
closed system (substances can not escape)
4 types of chemical equations
- synthesis
- decomposition
- single displacement
- double displacement
Synthesis
putting reactants together - ex. reactant + reactant –> product
Decompostion
Breaking down product –> reactant + reactant
Single displacement
AC + B –> A + CB
Double displacement
AC + BD –> AD + BC
What does every reaction need to get started
activation energy
Exothermic energy
Most energy?
reaction giving off - reactants (ex. fire)
beginning of it
Endothermic energy
Most energy?
reaction that takes in energy -product (ex. ice)
in hand
4 ways to change the rate of a reaction
- increase surface area
- increase concentration
- temperature change
- catalyst / inhibitors
Catalyst
a chemical that speeds up a chemical reaction
Inhibitor
a chemical that slows down a chemical reaction
Combustion
rapid reaction between oxygen & fuel
Fire triangle
Fuel
Oxygen
Heat
