The figure below is the plot of potential energy versus internuclear distance ( d ) of H 2 molecule in the electronic ground state. What is the value of the net potential energy E 0 (as indicated in the figure) in kJ mol - 1 , for d = d 0 at which the electron-electron repulsion and the…

Question

The figure below is the plot of potential energy versus internuclear distance ( d ) of H 2 molecule in the electronic ground state. What is the value of the net potential energy E 0 (as indicated in the figure) in kJ mol - 1 , for d = d 0 at which the electron-electron repulsion and the nucleus-nucleus repulsion energies are absent? As reference, the potential energy of H atom is taken as zero when its electron and the nucleus are infinitely far apart. Use Avogadro constant as 6 .023 × 10 23 mol − 1 . Mark total potential energy for 2 H-atom (per mole) as answer.

Aicharya · Accepted Answer

For one H atom P . E . &#8196; =- kq 1 q 2 r =- 9 &#215; 10 9 &#215; 1 .6 &#215; 10 &#8722; 19 2 0 .529 &#215; 10 &#8722; 10 =- 9 &#215; 1 . 6 &#215; 1 . 6 0 . 529 &#215; 10 - 19 Total potential energy for 2 H-atom (per mole) =- 2 &#215; 9 &#215; 1 .6 &#215; 1 .6 0 .529 &#215; 10 &#8722; 19 &#215; 6 &#215; 10 23 = -5246 .5 &#8196; kJ / mole

The figure below is the plot of potential energy versus internuclear distance ( d ) of H 2 molecule in the…

Solution