Question: When a molecule absorbs a photon, momentum is conserved. If an H 2 molecule at 500. K absorbs an ultraviolet photon of wavelength 175 nm,

When a molecule absorbs a photon, momentum is conserved. If an H₂ molecule at 500. K absorbs an ultraviolet photon of wavelength 175 nm, what is the change in its velocity, Δv?

Given that its average speed is v _rms = √3k_BT/m, what is ∆v/v _rms?

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