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					          Chapter 24:
    Organic Vs. Inorganic
        Compounds
 PS-3.2: Infer the practical applications
of organic and inorganic substances on
the basis of their chemical and physical
                properties
            Think About It 

   How does chemical bonding affect the
    formation of simple organic compounds?
   In what way do biological polymers have a
    role in living things?
             Organic Substances
   “Organic Chemistry” – study of carbon-
    containing compounds
   An organic compound:
       Usually composed of carbon and hydrogen
       Some with oxygen, nitrogen, halogens, even
        sulfur
       Carbon: can form 4 covalent bonds (also bonds
        with itself in chains, branched chains, or rings)
       Can form strong single, double, or triple bonds
       16 million + compounds known
             Organic Substances

   Hydrocarbons- Produce more than 90% of
    energy we use
       Composed of carbon & hydrogen
          CH4 – methane
          C3H8 – propane

          C2H6 – ethane

       Saturated Hydrocarbon: contains all of the
        hydrogen atoms it can hold
    Organic compounds continued

   Unsaturated compounds: compounds that
    contain at least one or more double or
    triple bonds
       Ethene, Ethyne
            Organic Substances
   Petroleum: a liquid fossil fuel made by decaying
    ancient organisms---used in fuels and to make
    plastics
   Polymers: Chains of smaller molecules linked
    together
     Repeating units of monomers
     “Poly….” prefix

    Example:
    Monomer -A-
    Polymer: -A-A-A-A-A-A-A-A-A-A-A-A-
Polymers
         Organic Substances

   Biological compounds
     Proteins –polymers of amino acids
      (chain of about 50)
       Amino acid (20) – acid end/base
        end
       Make up muscles, tendons, hair,
        fingernails
•Carbohydrate – polymers of sugars
  •Monosaccharide - glucose
  •Disaccharide – sucrose (table sugar)
  •Polysaccharide
  •Energy--starch


•Nucleic Acids – organic polymers that
control activities and reproduction of cells
  •DNA
Lipids: contain same elements as
carbohydrates but in different
proportions
•includes fats, oils, and cholesterol
        • saturated fats – only single
          bonds
           • unsaturated fats – contain
             at least one double bond
           Inorganic Substances

   Not organic—they do not contain bonds
    between carbon atoms
       Metals, metalloids
       Semi-conductors, ceramics
    Organic/Inorganic Substances

   C6H13NO2 (Lucien amino acid in protein)
   C6H12O6 (glucose)
   C5H5N5 (adenine)
   NaCl (salt)
   PO4 (phosphate ion)
   H2O (water)
                Video Link

   http://video.pbs.org/video/1786635771/?s
    tarttime=1495000

				
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posted:6/10/2012
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