1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Stellar structure - Helium burning

  1. Nov 11, 2012 #1
    1. The problem statement.
    Calculate the energy generated per unit mass, if helium burning produces equal amounts (mass fractions) of carbon and oxygen.
    mH = 1.672621581 x 10^-27 kg


    2. The attempt at a solution
    Helium burning produces carbon according to the following reaction:
    3He -> C [E(released) = 7.275 MeV]

    Helium burning produces oxygen according to the following reactions:
    3HE -> C [E(released) = 7.275 MeV]
    He + C -> O [E(released) = 7.162 MeV]
    ______________________________________________ overall reaction for He:
    4He -> O [E(released) = 14.437 MeV]


    equal mass fractions => X(C) = X(O)
    => m(C)/m(total) = m(O)/m(total)

    And then? I have no idea how to continue the exercise. Can anyone provide me with a hint?

    Thanks
     
    Last edited: Nov 11, 2012
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Stellar structure - Helium burning
  1. Helium radius (Replies: 0)

  2. Stellar wind (Replies: 0)

Loading...