The required energy to split up an Oxygen atom

  • Thread starter Gliese123
  • Start date
  • #1
144
0

Homework Statement


"Calculate how much energy that is required for a oxygen atom 168O to split it up into 4 α-particles"


The Attempt at a Solution


1: (8 * 1,00727646688)u + (8* 1,00866491578)u = 16,12753105 u
The first one is the Oxygen's 8 protons and the second one is its 8 neutrons.

2: 16O = 15,994915 u (Taken from a schedule)
We also have to discount the 8 electrons: 15,994915 u - (8 * 0,00054858) u = 15,99052636 u

3: 16,12753105 u - 15,99052636 u = 0,1370146888 u
That'd be the mass defect.

How do I then proceed? What should I do next? I'm a bit confused.
The answer is 14 MeV.
Thank you :redface:
 

Answers and Replies

  • #2
2
0
If I recall correctly, once you have obtained the mass defect, you should be multiplying by 931.5 to find the mass equivalent to the energy.

If I'm right, you've made a mistake somewhere. I'm on my iPod at the moment, so there isn't a great deal I can tell you, but when I get to a computer I'll look at it in more detail.
 
  • #3
tms
644
17

Homework Statement


"Calculate how much energy that is required for a oxygen atom 168O to split it up into 4 α-particles"


The Attempt at a Solution


1: (8 * 1,00727646688)u + (8* 1,00866491578)u = 16,12753105 u
The first one is the Oxygen's 8 protons and the second one is its 8 neutrons.

2: 16O = 15,994915 u (Taken from a schedule)
We also have to discount the 8 electrons: 15,994915 u - (8 * 0,00054858) u = 15,99052636 u

3: 16,12753105 u - 15,99052636 u = 0,1370146888 u
That'd be the mass defect.

How do I then proceed? What should I do next? I'm a bit confused.
The answer is 14 MeV.
Thank you :redface:
What about the energy of the four alphas?
 
  • #4
144
0
If I recall correctly, once you have obtained the mass defect, you should be multiplying by 931.5 to find the mass equivalent to the energy.

If I'm right, you've made a mistake somewhere. I'm on my iPod at the moment, so there isn't a great deal I can tell you, but when I get to a computer I'll look at it in more detail.
Thanks :P
 
  • #5
144
0
What about the energy of the four alphas?
Yeah. It's that. I don't really know how to add their value to it :/
 
  • #6
tms
644
17
Well, you can calculate it. And then you can compare it to oxygen.
 

Related Threads on The required energy to split up an Oxygen atom

Replies
2
Views
3K
Replies
1
Views
3K
Replies
11
Views
3K
Replies
1
Views
48K
Replies
14
Views
2K
Replies
1
Views
9K
  • Last Post
Replies
3
Views
5K
Replies
7
Views
1K
Replies
2
Views
4K
Top