Posted by Leila on Wednesday, May 8, 2013 at 12:51pm.
Estimate the total binding energy for copper.
550 MeV
Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons.
E= in Joules
Please help me out I got 1st part I need the Energy in joules am confused please help me out...thanks
Physics  Elena, Wednesday, May 8, 2013 at 6:33am
Number of atoms is
N= N(A)•m/μ =
=6.022•10²³•0.003/63.5•10⁻³=2.85•10²².
Number of nucleons (protons+neutrons) =
=2.85•10²²•63=1.8•10²⁴.
Energy = 1.8•10²⁴•550•10⁶•1.6•10⁻¹⁹ =1.58•10⁸ J
Thanks for the help but 1.58x10^8 J is wrong n I recalculated you calculation I got 1.58x10^14 J but that was also wrong so could you plz help me out.

Physics to Elena  Elena, Wednesday, May 8, 2013 at 3:16pm
I believe that the correct answer is 1.58•10¹⁴ J.

Physics to Elena  Leila, Wednesday, May 8, 2013 at 3:49pm
Thatz what I got too but itz still wrong :/ I don't know why please help me...thanks

Physics to Elena  Elena, Wednesday, May 8, 2013 at 5:19pm
Number of nuclei
N=n•N(A) = (m/μ) • N(A)=
=(3 g)•(6.022•10²³ nuclei/mol)/(63 g/mol)=2.87•10²² nuclei
The energy required to break all the copper nuclei into their constituent protons and
neutrons is
(550 MeV ) •(2.87•10²² nuclei) =1.56•10²⁵ MeV =
=1.56•10³¹eV =2.5•10¹² J
Answer This Question
Related Questions
 Physics  Estimate the total binding energy for copper. 550 MeV Estimate the ...
 Physics Need quick help please  Estimate the total binding energy for copper. ...
 Physics  Estimate the total binding energy for copper? in MeV Estimate the ...
 Math  Post a New Question Current Questions Homework Help: Math (HELP PLEASE) ...
 Physics  I'm sorry if it's a lot, but I want to make sure I didn't do any ...
 Physics  What amount of heat is required to raise the temperature of 350 grams ...
 chemistry  * A 50 gram sample of an unknown metal warms from 18 to 58 after ...
 physics  In compressed state, a spring 3.00 meters long hanging from the ...
 physics  A 0.75 kg mass of copper changes temperature from 145.0 C to 46.0 C. ...
 Chemistry  How do you convert energy into to joules (can you please give me an ...
More Related Questions