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Chemistry Chapter 3
Matter, Properities, Elements, Mixtures, etc.
| Terms | Definition |
|---|---|
| matter | mass that occupies space |
| physical properties | color, odro, volume, melting point, boiling point, density |
| chemical properties | ability to form new substances after changes ex. wood burning giving off heat and gases and leaving behind residues of ashes, rustin |
| element | substance that cannot be broken down into other substances by chemical methods |
| compound | substance composed of a given combination of elements that can be broken down into thos eelements by chemical methods |
| mixture | something that has a variable composition |
| pure substance | always has the same composition |
| 2 ways to separate mixtures | distillation and filtration |
| homogenous mixture | substances that cannot be separated physically |
| heterogenous mixture | substances that cna be easily separated physically |
| energy | the capacity to do work |
| how does temperature affect motion of molecules? | as temp increases, so does motion |
| calorie | amount of energy (heat) required to raise the temp. of one gram of water by one degree celcius |
| 1 cal=??J | 4.18 J |
| Specific heat/energy formula | Q= m x sh x tc |
| specific heat | amount of energy required to change the temp of ne gram of substances by 1 degree Celcius |
| Mass=? units | grams |
| specific heat=? units | j/g degress c |
| temperature change | degrees Celcius |
| energy/heat | Joules or calories |
Created by:
rolypoly333
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