Q10(b). Dissociation energy of Br₂ from the convergence limit
The continuum limit for the dissociation of Br₂ gas, Br₂(ground) = Br(ground) + Br(excited), occurs at 19,750 cm⁻¹. The transition of a ground bromine atom to an excited one corresponds to a wavenumber of 3865 cm⁻¹. Calculate the energy for the process Br₂(ground) = 2Br(ground) in cm⁻¹.
Model answer
The free solution for 2024 answers questions 1, 2, 3, 4, 5, 8, 9, 13, 14 and 15, the ones picked in its time plan. Question 10 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Coversdissociation energyconvergence limitBr₂ electronic spectrumspin–orbit excitationD₀
All parts of Question 10
- 10(a) The Franck–Condon principle5 marks
- 10(b) Dissociation energy of Br₂ from the convergence limit5 marks