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Woodruff- Chemical P
Woodruff- Chemical Properties
Question | Answer |
---|---|
chemical properties | the ability of a substance to undergo or resist chemical changes |
List three chemical properties that can be used to classify matter | 1. reacts with acids or bases 2. Combines with oxygen 3. Reacts with water |
Describe what happens when matter combines with oxygen in a rapid reaction | light + heat = burning |
Describe what happens when matter combines with oxygen in a slow reaction | no light + heat = rusting |
Chemical change | produces substances different from the original substances in both properties and composition |
Two examples of chemical changes | burning, corrosion (rusting, tarnishing) |
Chemical changes are always accompained by the ____. | release or absorption of energy. |
What is the type of energy required by some chemical reactions before the reaction can occur? | energy of activation |
endothermic reaction | a reaction that absorbs or takes in energy |
Two examples of endothermic reactions | cooking food and photosynthesis |
exothermic reaction | a reaction that gives off energy |
two examples of exothermic reactions | respiration in cells and oxidation |