Question 18.1.4: Propionaldehyde decomposes to form carbon monoxide when irra......
Propionaldehyde decomposes to form carbon monoxide when irradiated with a light of wavelength 3020 Å.
CH_3CH_2CHO \overset{hν} \longrightarrow CH_3CH_3 + COThe quantum yield for the reaction is 0.54. If 14050 erg mol of light is absorbed in a given time, find the number of moles of carbon monoxide formed in the same time.
Step-by-Step
We know that
one einstein (\mathrm{E})=\frac{1.196 \times 10^{16}}{\lambda} erg mol
when λ = 3020 Å
One einstein =\frac{1.196 \times 10^{16}}{3020} \mathrm{~erg} \mathrm{~mol}
or 14050 erg molof energy =\frac{14050 \times 3020}{1.196 \times 10^{16}}=3.547 \times 10^{-9} einstein
\Phi=\frac{\text { No. of moles of CO formed }}{\text { No. of einstein absorbed }}=0.54 \begin{aligned}\text{Hence moles of CO formed} &=0.54 \times 3.547 \times 10^{-9}\\ &=1.915 \times 10^{-9} \mathrm{~mol}\end{aligned}Related Answered Questions
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