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The dissociation of (molecular) chlorine...

The dissociation of (molecular) chlorine is an endothermic process, `DeltaH=243.6 kJ mol^(-1)`. The disoociation can also attained by the effect of light.
At what wavelength can the dissociating effect of light be expected?

Text Solution

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The correct Answer is:
`lambda_(1)=c/v_(1)" " from DeltaH=N_(a) hv_(1)` it follows that
`lambda_(1)=(cN_(A)h)/(DeltaH)=(3.10^(8)xx6.02*10^(23)xx6.6.10^(-34))/(2.436.10^(5))=4.91.10^(-7)" "m=491 nm`
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