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    I've been stuck on this physics question for ages and I still can't figure out the answer.

    The net effect of this process is to convert four protons into one Helium-4 nucleus and release a large amount of energy. The overall reaction is:

    4H --> He + 2Beta Particles

    together with the emission of 2 neutrinos and 2 gamma particles
    b) What is (i) the total mass loss (ii) the total energy released in the overall reaction?

    Thanks in advance.
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    (Original post by Draconid)
    I've been stuck on this physics question for ages and I still can't figure out the answer.

    The net effect of this process is to convert four protons into one Helium-4 nucleus and release a large amount of energy. The overall reaction is:

    4H --> He + 2Beta Particles

    together with the emission of 2 neutrinos and 2 gamma particles
    b) What is (i) the total mass loss (ii) the total energy released in the overall reaction?

    Thanks in advance.
    A level?

    have you got any data on the rest mass of a He-4 nucleus and a proton... either on the data sheet or from an earlier section of the question?
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    Use the mass deficit equation for the mass loss and for total energy released I think it's mass loss as energy
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    (Original post by triton62674)
    Use the mass deficit equation for the mass loss and for total energy released I think it's mass loss as energy
    Whats the mass defict equation, havent heard of it before.
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    (Original post by Draconid)
    Whats the mass defict equation, havent heard of it before.
    Bet you've heard of E=mc2
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    (Original post by Draconid)
    Whats the mass defict equation, havent heard of it before.
    http://www.chem.purdue.edu/gchelp/ho...ing_energy.htm
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    (Original post by Joinedup)
    A level?

    have you got any data on the rest mass of a He-4 nucleus and a proton... either on the data sheet or from an earlier section of the question?
    we are told to use the data sheet for the masses of a proton and positron; the mass of a helium nucleus is 4.00151u.
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    (Original post by Draconid)
    we are told to use the data sheet for the masses of a proton and positron; the mass of a helium nucleus is 4.00151u.
    The nucleus of hydrogen is a proton, u have the mass of proton on formula sheet.

    Do initial mass-final mass to work out the change in mass, leave in terms of the atomic mass unit up until this point, then convert to kg.

    Plug into E=mc^2 and find the energy lost
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    (Original post by Draconid)
    we are told to use the data sheet for the masses of a proton and positron; the mass of a helium nucleus is 4.00151u.
    Anything funny happened to the masses of the products of the reaction compared to the 4 protons going in?
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    (Original post by Joinedup)
    Anything funny happened to the masses of the products of the reaction compared to the 4 protons going in?
    Not really.
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    (Original post by Shaanv)
    The nucleus of hydrogen is a proton, u have the mass of proton on formula sheet.

    Do initial mass-final mass to work out the change in mass, leave in terms of the atomic mass unit up until this point, then convert to kg.

    Plug into E=mc^2 and find the energy lost
    Ahhh okay, I understand now, thanks for the help
 
 
 
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