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Organic Chemistry. Carbon Based Life Alkanes. Chemical Composition of Cell. 70% of cytoplasm is water 96% of Cell is CHNOPS Carbon, hydrogen, nitrogen, oxygen, potassium, sulfur 5,000 different compounds Only has to absorb a few nutrients to synthesize all of these.

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organic chemistry

Organic Chemistry

Carbon Based Life

Alkanes

chemical composition of cell
Chemical Composition of Cell
  • 70% of cytoplasm is water
  • 96% of Cell is CHNOPS
  • Carbon, hydrogen, nitrogen, oxygen, potassium,
  • sulfur
  • 5,000 different compounds
  • Only has to absorb a few nutrients to
  • synthesize all of these.
  • Can make most everything they need
organic compounds
Organic Compounds
  • Contain carbon
  • Have covalent bonds
  • Have low melting points
  • Have low boiling points
  • Burn in air (oxygen)
  • Are soluble in nonpolar solvents
  • Form large molecules
hydrocarbons
HYDROCARBONS
  • Contain only carbon and hydrogen
  • • May contain single, double or triple bonds
  • between carbon atoms
  • • C C C=C or C C
  • • Primary compounds present in petroleum
alkanes
Alkanes
  • Contain C and H only
  • Contain single bonds C-C
  • Have 4 bonds to every carbon (C) atom
  • Are nonpolar
complete structural formulas
Complete Structural Formulas
  • Show the bonds between each of the atoms
  • CH4 , methane
more alkanes
More Alkanes
  • Condensed Structural Formulas
  • Ethane
    • CH3 CH3
  • Propane
    • CH3 CH2 CH3
learning check alk1
Learning Check Alk1
  • A. What is the condensed formula for
  • B. What is its molecular formula?
  • C. What is its name?
solution alk1
Solution Alk1
  • A. CH3CH2CH2CH3
  • B. C4H10
  • C. butane
reactions of alkanes
Reactions of Alkanes
  • Combustion
  • alkane + O2  CO2 + H2O + heat
  • Products are always CO2 and H2O
learning check alk3
Learning Check Alk3
  • Complete and balance the reaction for the complete combustion of C7H16
  • Step 1

C7H16 + O2  CO2 + H2O

  • Step 2

C7H16 + O2  7 CO2 + 8 H2O

  • Step 3

C7H16 + 11 O2  7 CO2 + 8 H2O