chemistry chapter 1 section 2
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Created by:
mlmoody Plus on September 28, 2009
Subjects:
physical & chemical properties of matter
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10 terms
Terms | Definitions |
|---|---|
 physical properties | properties that don't involve changes in composition |
| temperature | physical state of a substance depends on this |
| volatile | substance that changes to a gas easily at room temperature |
| density | amount of matter contained in a unit of volume |
| chemical properties | properties that can be observed only when there is a change in the composition of a substance |
| instability | a substance's tendency to break down into different substances |
| law of conservation of mass | states that in a chemical change matter is neither created nor destroyed |
| energy | the capacity to do work |
| exothermic reactions | chemical reactions that give off heat energy |
| endothermic reactions | chemical reactions that absorb heat energy |
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