Subject: Physical Chemistry · Chapter: Molecular Spectroscopy · Topic: Molecular Spectroscopy – General · Exam: NET DEC 2012 · Marks: 2 · Difficulty: Medium
The absorption spectrum of $\mathrm{O}_{2}$ shows a vibrational structure that becomes continuum at $56875 \mathrm{cm}^{-1}$. At the continuum, it dissociates into one ground state atom $\left(\mathrm{O}_{\mathrm{g}}\right)$ and one excited state atom $\left(\mathrm{O}_{\mathrm{e}}\right)$. The energy difference between $\mathrm{O}_{\mathrm{e}}$ and $\mathrm{O}_{\mathrm{g}}$ is $15125 \mathrm{cm}^{-1}$. The dissociation energy (in $\mathrm{cm}^{-1}$ ) of ground state of $\mathrm{O}_{2}$ is: