Question

Heated lithium atoms emit photons of light with an energy of 2.961 × 10−19 j. what is the energy of 1.00 mol of these photons?

Answer 1

Energy of Photon emitted by heated lithium atom E = 2.961 Ă— 10â’19 J We need energy for only one mole of photons n = 1 Total photons in one mole = 6.022x10^23 photons / mole Total Energy = n x h x E => 1 x 6.022x10^23 x 2.961 Ă— 10^â’19 Total Energy = 1.783x10^5 J