Answer:
the longest wavelength of light that has sufficient energy to break the weakest bond in hydrogen peroxide is 842nm
Explanation:
Δ
H
=
142 kJ/mol
This is the energy for 1 mol of molecules.
For 1 molecule,
[tex]E = \frac{142000J}{1mol} \frac{1mol}{6.022 \times 10^2^3molecules} \\ = 2.358 \times 19^-^1^9J[/tex]
[tex]E = \frac{h_c}{\lambda}[/tex]
[tex]\lambda = \frac{h_c}{E} \\ = \frac{6.626 \times 10^-^3^4Js \times 2.998 \times 10^8m/s}{2.358 \times 19^-1^9J} \\= 8.42 \times 10^-^7\\\\=842nm[/tex]
the longest wavelength of light that has sufficient energy to break the weakest bond in hydrogen peroxide is 842nm
