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What is the amount of energy released from an exploding firecracker?

  1. Sep 15, 2010 #1
    Let's say the standard size firecracker if there is a standard.
     
  2. jcsd
  3. Sep 15, 2010 #2
    What about doing an experiment? Make a pendulum with a little cup on the end and set the firecracker in their and try to focus the explosion so it will rotate the pendulum ,
    Then measure the change in height of the pendulum . mgh is the gravitational potential energy. Ballistic pendulum idea or do something with momentum conservation.
     
  4. Sep 16, 2010 #3
    Nope. Too many losses, would introduce errors on the order of 50% or more.
     
  5. Sep 16, 2010 #4

    Borek

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    Staff: Mentor

    Using standard enthalpy tables will get you quite close to the answer.

    Perhaps the best experimental approach is to make the firecracker explode in a calorimeter. Some ideas are probably mentioned in this book: http://www.springerlink.com/content/x40850v6628r6270/
     
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