It requires 945.0 kJ/mol to break N2 molecules into atoms. Calculate the maximum wavelength of light that will still break these molecules apart.

Question

I tried converting the energy to kj and using E=hc/wavelength but that didn't give me the right answer...

Answer 1

First you need to determine the energy required to break "one molecule" of nitrogen. You know how much is required to break 6.022E23 molecules(1 mole), so divide that 945,000 J/6.022E23 to find for 1 molecule. Then apply the E = hc/wavelength and see if that doesn't give you the correct answer.

Answer 2

it did work, thanks!