Question

Part 1 (2.5 points) If light has a wavelength of 415 nm, what is the energy of this light expressed in kJ/mol? 4.79 x 10-20 kJ/mol + Part 2 (2.5 points) A beam of radiation has an energy of 1.84x102 kJ/mol. What is the wavelength of this light? x 10-18 nm - 1.08

Answer 1

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Past 1 lavelength a photun a Lght 15 nm lo-m) 4.15 X17m E hve he Ener9y abhoton a Ight Frequency a light h- Planckis tontant -34 6.626 X10 Js CSheed a light Enekpy af a pho.ton Ep 3.0 K168 ms hc 4.79 X 10-197 6 626 X10JS 4.15 X101m X 3.0X108 ms 7 EpE Enctyof light-E Ep X NA NA photons 1male af photuns a light G.023 Xlo In mol X G.023 Xlo 23 4.79 X10-19 J E = 28.85 X101Jmol lo00 JIKJ -7 288.5 KT mol-t E Aswety 2.9 X lo2 KJ mol E Part 2 Enexy al bean radraton Enerpy af photun a! 1ght E= 1.84 Xlo KT mol NA -19 3.055 X10 J - 22 3i055 X10 KJ 1.84 X10 KTm6 6.023 X1023 mo1 Ep= lo00 J- IKJ hc EP Epe hc C.6.26 Xlo X 3.0x l8ms 3.655 Xlo-19 6.50 Xlo m 650 nm (Inm- 16-1m) Hence the wnelenglh Irght is 650 nm