Chapter 21.txt

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Chapter 21.txt
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2011-10-22 17:31:38
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    • author "me"
    • fileName "Chapter 21"
    • tags ""
    • description ""
    • Chemical reaction
    • Process in which one or more substances are changed into new substances
  1. Reactant
    In a chemical reaction, the substance that reacts
  2. Product
    In a chemical reaction, the new substance that is formed.
  3. Chemical equation
    Shorthand method to describe chemical reactions using chemical formulas and other symbols
  4. Coefficient
    Number in a chemical equation that represents the number of units of each substance taking part in a chemical reaction
  5. Balanced chemical equation
    Chemical equation with the same number of atoms of each element on both sides of the equation
  6. Combustion reaction
    A type of chemical reaction thay occurs when a substance reacts with oxygen to produce energy in the form of heat and light
  7. Synthesis reaction
    Chemical reaction in which two or more substances combine to form a differant substance
  8. Decomposition reaction
    Chemical reaction in which one substance breaks down into two or more substances
  9. Single displacement reaction
    Chemical reaction in which one element replaces another element in a compound
  10. Double displacement reaction
    Chemical reaction that produces a precipitate, water, or gas when two Ionic compounds in solution combined
  11. Precipitate
    Insoluble compound that comes out of solution during a double-displacement reaction.
  12. Oxidation
    The loss of electrons from the atoms of a substance
  13. Reduction
    The gain of electrons by the atoms of a substance
  14. Exergonic reaction
    Chemical reaction that releases some form of energy, such as light or heat.
  15. Exothermic reaction
    Chemical reaction in which energy is primarily given off in the form of heat
  16. Endergonic reaction
    Chemical reaction that requires energy input in order to proceed
  17. Endothermic reaction
    Chemical reaction that requires heat energy in order to proceed
  18. Catalyst
    Substance that speeds up a chemical reaction without being permanently changed itself.
  19. Inhibitor
    Substance that slows down a chemical reaction or prevents it from occuring by combining with a reactant

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