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Reply Thu 15 Nov, 2012 10:59 am
Exactly how much energy is released when 2 hydrogen atoms fuse?
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Type: Question • Score: 3 • Views: 1,001 • Replies: 4
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dalehileman
 
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Reply Thu 15 Nov, 2012 12:22 pm
@bwana1964,
http://www.google.ca/#hl=en&sugexp=les%3B&gs_nf=3&cp=55&gs_id=2&xhr=t&q=how+much+energy+is+released+when+2+hydrogen+atoms+fuse&pf=p&output=search&sclient=psy-ab&oq=how+much+energy+is+released+when+2+hydrogen+atoms+fuse%3F&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=9479220e41580a7d&bpcl=38625945&biw=1386&bih=885
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Enzo
 
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Reply Thu 15 Nov, 2012 04:48 pm
@bwana1964,
2 hydrogen atoms fuse to create what?

There are two likely scenarios where the fusion creates a tritium and a proton OR the fusion creates 2-helium and a neutron. I will not show work for both of these products as I've better things to do, so until you tell me what it fuses into, I'll hold from answering your question.
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Enzo
 
  2  
Reply Thu 15 Nov, 2012 04:51 pm
Generally speaking, this is how you go about tackling the problem.

Relevant equation:
ΔE = Δm*c^2
Δm = mass of initial − mass of final
Mass of nucleus = mass of protons + mass of neutrons - mass defect
The above equation will be required to calculate the mass of the 3-helium nuclei, if the question gives that the fusion creates a 3-helium atom and a neutron as products.



dueterium nucleus: 2.013553 u
tritium nucleus: 3.015501 u

Optional Conversion Values:
1u = 1.660538921 x 10^−27 kg
c^2 = 931.5MeV/u

Solve for ΔE and you get your energy
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raprap
 
  2  
Reply Fri 16 Nov, 2012 06:16 am
@bwana1964,
Question needs clarification.

Quote:
Exactly how much energy is released when 2 hydrogen atoms fuse?


Two possibilities; as 2 hydrogen atoms can fuse to make hydrogen molecule (H2), or 2 hydrgen nuclei can fuse to make a helium nuclei.

Two diferent problems.

Rap
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