UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper II
Q9. Ground-level energy change for HD + DCl → D₂ + HCl
Question
The energy-equivalent wavenumbers obtained from the vibrational spectra of HD, D₂, HCl and DCl in their ground level are 3627, 2990, 2885 and 1990 cm⁻¹ respectively. Calculate the energy change (in J mol⁻¹) of the reaction HD + DCl → D₂ + HCl in the ground level.
Model answer
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Coverszero-point energyisotope exchangevibrational spectraHD DCl