Calculate the energy, in kilojoules, of one mole of photons of blue laser light of wavelength...
Calculate the energy, in kilojoules, of one mole of photons of blue laser light of wavelength 435 nm.
Homework Answers
Given:
lambda = 4.35*10^-7 m
Find energy of 1 photon first
Given:
lambda = 4.35*10^-7 m
use:
E = h*c/lambda
=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(4.35*10^-7 m)
= 4.57*10^-19 J
This is energy of 1 photon
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 4.57*10^-19*6.022*10^23 J/mol
= 2.752*10^5 J/mol
= 2.752*10^2 KJ/mol
Answer: 275 KJ
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