- This topic has 1 reply, 2 voices, and was last updated 4 weeks ago by
.
Viewing 2 posts - 1 through 2 (of 2 total)
-
Posts
-
Hi, i am confused about how to obtain the coulomb interaction energy per cell, can someone help me to list the step for the calculation, thanks a lot.
The formular to use is the electric potential energy: E=k(q1*q2)/r. With k=1/(4*pi*e0) being a constant that is ignored (or integrated in q). q1 and q2 are the charge e of an electron or -e for a proton. r is the distance that you can calculate dependant on d with pythagoras between the different particles (e-e, e-p, p-p). If you add these three terms together you get the total energy of the solid. Though for me this is only (-sqrt(2)+2)(q^2/d), which is a positive energy altogether. I am missing the factor 3, so still something is wrong…
Viewing 2 posts - 1 through 2 (of 2 total)
- You must be logged in to reply to this topic.