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Chem Ch. 3
Matter
| Term | Definition |
|---|---|
| atom | fundamental building block of matter |
| molecules | combos of 2 or more atoms |
| 3 phases of matter | Solids, Liquids, Gasses |
| pure substance | anything that consists of only 1 type of atom or molecule |
| element | any substance that can't be broken down further |
| compound | a substance that has 2 or more elements |
| mixture | 2 or more elements &/or compounds |
| homogenous mixture | uniform composition (ex: clean air or clean water) |
| heterogenous mixture | varying composition (ex: smog) |
| physical properties | property/change that does NOT affect the chemical composition (ex: boiling water or freezing water) |
| chemical properties | property DOES change the chemical composition |
| conservation of mass | mass is conserved, but mass is not created or destroyed |
| conservation of energy | energy can't be created or destroyed, energy is transformed from 1 type to another |
| unit of energy - Joule | si unit |
| unit of energy - calorie | the energy required to raise the temperature of 1 gram of water by 1 degree Celsius |
| temperature | measure of thermal energy |
| thermal energy | energy associated with the random motion of atoms/molecules |
| heat | transfer of thermal energy (from hot to cold) caused by difference in temperature |
| g = (m)(Cs)(ΔT) | g = heat m = mass of sample Cs = specific heat of sample ΔT = change in temperature |
Created by:
nat.riv
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