ch 2 chemical reactions
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15 terms
Terms | Definitions |
|---|---|
 chemistry | the study of matter and how matter changes |
| energy | every chemical reaction involves a change in? |
| chemical change | the burning of gasoline is a |
| endothermic | a chemical reaction that absorbs energy in the form of heat |
| matter | anything that has mass and takes up space |
| substance | the only sure evidence for a chemical reaction is the production of one or more? |
| chemical reaction | what happens when chemical bonds break and new bonds form? |
| formula | CaCo3 represents a chemical? |
| chemical change | A change that produced a new substance is a |
| properties | a chemical reaction may be detected by observing changes in the ? of matter |
| bonds | in a chemical reaction, chemical ? are formed or broken |
| chemical | changes occur when bonds form between atoms, or when bonds break and new bonds form |
| precipitate | a solid that forms solution during a chemical reaction |
| chemical formula | the ? of a compound shows the ratio of elements present in the compound |
| exothermic reaction | a chemical reaction that releases energy in the form of heat |
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