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Homework Help: (101)Nuclear Energy

  1. Apr 27, 2008 #1
    [SOLVED] (101)Nuclear Energy

    1. The problem statement, all variables and given/known data
    According to the Big Bang model, all of the 12C in the universe was made in stars. One process that occurs in older stars is the triple-alpha process in which three alpha particles are turned into 12C. The mass of an alpha particle (an alpha particle is a 4He nucleus) is 6.646477E-27 kg. The mass of 12C is 19.926464E-27 kg. How much energy is released in the triple-alpha process? Give your answer both in pJ and in MeV.

    2. Relevant equations
    Thats.. what I need to know.
    1 eV=1.6x10^-19 J
    pJ= x10^-12

    3. The attempt at a solution

    I do not know the formula required to solve this; this topic was glanced over during a class and a half, and I had to miss one of them. Could you please help me out?

    Thank you so much!
  2. jcsd
  3. Apr 27, 2008 #2


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    Heard of E=mc^2 ?
    Whats the mass of 3x alpha particles, whats the mass of 12c, whats the difference?
  4. Apr 27, 2008 #3
    Haha, I feel stupid. Thank you for the quick response!
  5. Apr 30, 2008 #4
    Can you tell me what answer you got. Thanks.
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