Science Study Guide
Exothermic
change when energy is released; combustion realeases heat and EME
Endothermic
change when energy is taken into the reaction. Energy enters the reaction.
examples of chemical changes
combustion, electrolysis, oxidation, tarnishing
Other physical changes
dissolving, blending, crushing, breaking and substances
What is a chemical change?
A change in matter that produces one or more new substances
Exothermic
Change when energy is released: combustion releases heat and eme.
Define temperature
ability to do work or cause change
heat has a specific movmeent in which direction does it move
hot to cold always
What does the LOCM state
matter cant be created or destroyed ( chem or physical). THe same amount of matter that is at the beginning of the reaction will be the same amount that is at the end.
Three states of matter
solid, liquid, gas
whats the difference between a state of matter and a phase of matter
state- the form of the matter at a given temp and pressure as you see it here and now. Phase- Described changes that matter takes when it goes from one state to another.
Define thermal energy
the total kinetic energy of the particles that make up a substance