How do fission and fusion release energy?

Watch this thread
Mathstermind
Badges: 11
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 2 years ago
#1
So we’ve just covered fission and fusion in class and I’m still at a loss as to how they release energy. I get that we go from a less stable nucleus to a more stable nucleus. But to work out the energy release we work out the mass change and use e=mc^2 . My issue is that, surely this mass change goes into the binding energy of the new nuclei (or nucleus) as the new nuclei or (nucleus) have a higher binding energy? If so then surely there’s no energy released bc that increased binding energy is ‘trapped’ in the new nuclei (or nucleus)??
0
reply
anosmianAcrimony
Badges: 20
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 2 years ago
#2
The binding energy of a nucleus is the energy needed to break apart that nucleus. It isn't stored or trapped in the nucleus. A nucleus with a higher binding energy is more stable.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How did your AQA A-level Physics Paper 1 exam go?

Great! Feeling positive (144)
29.27%
It went fairly well (234)
47.56%
It didn't go too well (73)
14.84%
TERRIBLE! (41)
8.33%

Watched Threads

View All