theoretical question

homemade Posted By homemade, Dec 22, 2012 at 8:56 AM

  1. homemade

    homemade
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    if you burn a pound of pellets and captured all smoke do you still get a pound of ash and whatever
     
  2. pen

    pen
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    Yes. Law of conservation of mass.

    pen
     
  3. homemade

    homemade
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    thanks so much that is what i thought, so my pellet stove i made is getting close to 90 plus efficiency
     
  4. Jack Morrissey

    Jack Morrissey
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    What about the heat, the energy used to heat aren't recoverable to "weigh"
     
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  5. jjs777_fzr

    jjs777_fzr
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    Nov 9, 2007
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    No you will not get a 1lb of whatever leftover from burning 1lb of pellets.
     
  6. pen

    pen
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    Imagine finding the weight of an empty tanker with 1lb of pellets in it. Then you seal the tanker and let the pellets inside burn. If nothing goes in or out (other than the heat energy) the mass will stay the same.

    In a case like this you just changed the type of matter, you never destroyed an atom, just rearranged them. The energy was found in the bonds that held the original compounds together.

    pen
     
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  7. pen

    pen
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    If all the byproducts of combustion are conserved, yes you will. This is why chemical equations must be balanced.

    The Law of Conservation of Mass

    • Established in 1789 by French Chemist Antoine Lavoisier
    • States that mass is neither created nor destroyed in any ordinary chemical reaction.
    • Or more simply, the mass of substances produced (products) by a chemical reaction is always equal to the mass of the reacting substances (reactants).
    pen
     
  8. CT Pellet

    CT Pellet
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    This gets complicated but I will give it a whirl. Technically, when you burn the pellets, all of the remaining ash, coupled with the mass of the emissions, will be greater than one pound. Here is why.
    The chemical equasion for combustion is as follows:
    matter + heat energy + O2= CO2 + H20
    Essentially, matter and heat and oxygen will yeild Carbon dioxide and water, which accounts for all of the organic matter that is burned. The wood fiber in the pellets is essentially made up of carbon, hydrogen and oxygen and after combustion, what remains is all of the inorganic matter, such as iron, magnesium and sulfer. But, all of the inorganic matter remains in the form of ash. (although some inorganic matter escapes in fine particles as smoke)
    When you mass out all of the ash and add it to the mass of the emissions, it will be greater than the one pound of pellets because through combustion, you have also added 02 to the one pound of pellets. This is not as a result of the law of conservation of matter, as this law only dictates that matter can neither be created nor destroyed.
     
  9. whlago

    whlago
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    I'm so confused
     
  10. pen

    pen
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    Matter is not created or destroyed in ordinary chemical processes.

    You burn something, you simply turn it into something new by rearranging the atoms. The new substance has less energy that the original substance which is why your home gets heated.
     
  11. jgrz0610

    jgrz0610
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    7. 7 is always the answer.
     
  12. homemade

    homemade
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    what a conversation i agree with pen though otherwise the earth would be a different weight after billions of years of some sorta burning
     
  13. homemade

    homemade
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    not 7.6 or 7.8
     
  14. IHATEPROPANE

    IHATEPROPANE
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    Nobody asked yet....pellet stove you MADE? Pics please
     
  15. CT Pellet

    CT Pellet
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    Actually, the Earth IS a different weight. (technically, it is a different mass)
    Anytime we launch a satelite or build a space station or send a rocket up into space, we leave matter behind. The mass of the earth decreases every time we leave something from Earth in outer space.
     
  16. homemade

    homemade
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    chit thats right you got me there
     
  17. pen

    pen
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    Yea but we also gain mass from all the space debris (such as meteor or meteorites) that get sucked into earth's gravity.
     
  18. St_Earl

    St_Earl
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    and it's added to as well. meteorite (and micrometeorites) and other matter and particles are constantly incoming.

    DOH! didn't see pen's reply.
     
  19. St_Earl

    St_Earl
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    but i agree... where are the pics of this pellet stove!
     
  20. homemade

    homemade
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    might have to take new pic lost the other ones
     
  21. homemade

    homemade
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    this is where it all started
     

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  22. St_Earl

    St_Earl
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    ok. forgive me. it's very cool that you have done this.

    it's just that the first thing i think seeing that particular photo, is the Red Green show. : P
    lol. could be the umbrella.

    it sounds like you are getting great efficiency, from what you mentioned.
     
  23. homemade

    homemade
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    Jul 28, 2012
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    the umbrella was to keep the ceiling from getting wet now i vent outside
     
  24. homemade

    homemade
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    good show haven't seen in awhile
     

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