Unit 7

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Author:
jb124
ID:
287262
Filename:
Unit 7
Updated:
2014-10-27 20:16:19
Tags:
chemical reactions
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Description:
chemical reactions
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  1. what does an arrow mean in a chemical equation?
    • "yields"
    • "gives"
  2. when do chemical reactions occur?
    when substances go through chemical changes to form new substances
  3. what is a substance that participates in a chemical reaction?
    reactant
  4. what is a substance that forms in a chemical reaction?
    product
  5. chemical reactions always involve what?
    changes in energy
  6. what must be added to break bonds?
    energy
  7. energy released when a chemical compound reacts to produce new compounds
    chemical energy
  8. where does the chemical energy released in a chemical reaction come from?
    from the stored energy in chemical bonds
  9. chemical reaction in which energy is released to the surroundings as heat
    exothermic reaction
  10. chemical reaction that requires energy input
    endothermic reaction
  11. reactions that release energy are ___ (exothermic/endothermic)
    exothermic
  12. reactions that absorb energy are ___ (exothermic/endothermic)
    endothermic
  13. what is the difference between an exothermic reaction and endothermic reaction?
    • exothermic reactions releases energy
    • endothermic reactions absorb energy
  14. what type of reaction is photosynthesis?
    endothermic

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