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Quantum Chemistry & Molecular Spectroscopy question bank (Physical Chemistry, Quantum & Thermodynamics)

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Q1.
For a quantum particle of mass m trapped in a one-dimensional infinite potential well of length L (0 <= x <= L), what is the energy of the first excited state (n=2)?

(A)
4h^2 / (8mL^2)
(B)
h^2 / (8mL^2)
(C)
9h^2 / (8mL^2)
(D)
2h^2 / (8mL^2)
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