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An important reaction in production of s...

An important reaction in production of smog is
`NO_(2)(g)+hv rarr NO(g)+O(g)`
If light of wavelength `4.4xx10^(-7) m` is used to cause above reaction. Calculate `N-N` bond enthalpy.
`{:("Given :",DeltaH_(f) [NO(g)]=91" kJ mol"^(-1)" ",,h=6.6xx10^(-34) Js),(,DeltaH_(f) [N_(2)O_(4)(g)]=9" kJ mol"^(-1)" ",,c=3xx10^(8) ms^(-1)),(,DeltaH_(O=O)=498" kJ mol"^(-1)" ",,N_(A)=6xx10^(23)):}`

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