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Homework Help: Help with Propanal formulas

  1. Dec 13, 2007 #1

    Tak

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    1. The problem statement, all variables and given/known data

    I am trying to find a balanced equation for Propanol, and in addition - what is the Kcal/gram of Protonal


    2. Relevant equations

    I think I'm starting with CH3 CH2 CH2 OH (left side) and CO2 H20 (right side)

    3. The attempt at a solution


    CH3CH2CH2 OH to 6CO2 2H20 I'm not sure if that balances the equation or not. Additionally I have been trying to find information on Propanal being used as a bio fuel but all the sites I am able to pull up only talk about methanol and ethanol - what am I missing?

    Thanks allot





    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 14, 2007 #2

    chemisttree

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    When you balance a formula, the same number of atoms of each species must be balanced. I notice that you have

    [tex]CH_3-CH_2-CH_2-OH \rightarrow\ 6CO_2 + 2H_2O[/tex]

    Is this balanced?
     
  4. Dec 14, 2007 #3

    Tak

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    OK, so if I count up the atoms in the original formula - CH3 CH2 CH2 OH (left side) and CO2 H20 (right side)

    C has 3 on the right 1 on the left
    H has 8 on the right 2 on the left
    O has 1 on the right 3 on the left

    Then to balance is it CH3 CH2 CH2 2OH - 2CO2 4H20 ?
     
  5. Dec 14, 2007 #4

    chemisttree

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    It should be: [tex]CH_3-CH_2-CH_2-OH \rightarrow\ 2CO_2 + 4H_2O[/tex]
    (but something(s) is wrong about it)

    The way I see it there are three carbons on the left and 2 on the right.
    There are 8 hydrogens on the left and 8 on the right.
    There is one oxygen on the left and 8 on the right.

    Is this balanced?
     
    Last edited: Dec 14, 2007
  6. Dec 21, 2007 #5
    Propanal / Propanol ?

    They are not the same thing, which one is it ?

    One is [tex]C_{3}H_{8}O[/tex] propanol (has 2 forms, propan-1-ol and propan-2-ol )

    The other is [tex]C_{3}H_{6}O[/tex] propanal


    Before you even start balancing you need to know which chemical you actualy mean. From contect of burning of fuels I assume it is propanol and propan-1-ol at that.


    P.S. What else is needed to make fire ... fuel + ?
     
    Last edited: Dec 21, 2007
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