Question

Q7 Understanding Lennard-Jones potential energy curves (10 points) 0.2 A) Lennard-Jones Potential energy curve for Cu-Cu is shown here: 1) Approximate the value of internuclear distance (in Å) for Cu-Cu: 0.1 • (ev) 0 -0.1 2) Approximate the value of potential energy (in eV) of the copper molecule: -0.2 To 3 5 (A) B) Lennard-Jones plot for A-A and B-B atoms is shown here: Lennard-Jones pot veus distance 1) Which atoms are larger? -A -B 2) Which has stronger attraction between atoms? -A -B

Answer 1

Quus According to Lennaud Jones plot V001 - 4E G 91 A=4E12 or B= UEOG 7(4) = A - B r12 r6 V Intermolecular poential between too atoms cometeules well depth distance at which the intermoleuta polential blo tuo is zero. particle

T As In goaph atom B has morle distance of a lie dritance blu two internucleau particle is zero) Than A atom is more sebuleire I weaken & bigger than B atom B 8 larger songer atom A.