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The dissociation energy of H2 is 430.53 k J rnol-1 . If H2 is exposed to radiation energy of wavelength 253.7 nm, what % of radiant energy will be converted into kinetic energy?
Asked by eggwallet18 | 28 Apr, 2019, 09:29: PM
Expert Answer
Given:
The dissociation energy of H2 = 430.53 kJ/mol
= 430.53× 103 J/mol
Wavelength=253.7 nm
= 253.7 ×10-9 m
Planck's constant, h = 6.626×10−34 Jsec
To break H-H bond energy reaquired is,
Energy of photon =
Energy converted to kinetic energy =
78.35 ×10−20 − 71.49 ×10−20 J
= 6.86 ×10−20 J
% of radiant energy converted into kinetic energy,
8.75% of radiant energy will be converted into kinetic energy.
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