Calculate the energy in kilocalorie per mole of the photons of an emr of wavelength 7600 ex. sol. = 7600 À 7600x 103 cm c = 3 x 1010 cm s- frequency 3x10 cms 76

Calculate the energy in kilocalorie per mole of the photons of an EMR of wavelength 7600 Ex. Sol. = 7600 À 7600x 103 cm C = 3 x 1010 cm s- Frequency 3x10 cms 7600x10 10 cm = 3.947x 1014 s1 E = hv = 6.6x 10-2erg s x 3.947 x 1014s = 2.6 x 10-12 erg. v = Energy of one mole of photons = 2.6 x 10-12 erg x 6.02 x 103 mol = 15.7x 101 erg mol 15.7x 104 J mo = 157 KJ mol Energy of one mole of photons in kilocalorie 157 KJmol 4.185 Jcal = = 37.53 kcal mo-1