posted by Kyle on .
A light photon with a frequency of at least 0.0373 × 1016 Hz is required to split apart diiodine according to the equation:
I2(g) → 2I(g)
Calculate the energy (kJ) required to break apart a mole of diiodine. Express answer in scientific notation.
I got 2.47 * 10^-22 but it's incorrect.
I used the equation: E = (h)(v)
h = 6.624*10^-34 J*s
f = 3.73*10^14 s^-1
h*f = 2.47*10^-19 joule
= 2.47*10^-22 kJ
That is the energy need to break apart a molecule, NOT a mole. You must multiply that number by Avogadro's number. You should get about 149 kJ/mole