What is the energy (E) of a single photon of light with a wavelength of 488 nm? 20492 cm-1 4.07 x 10-19 J 245 kJ/mol 1.64 x 10-18 J This one is calculated using E = hν or E = hc/λ. What is the energy (E) of a mole of photons of light with a wavelength of 488 nm? 20492 cm-1 4.07 x 10-19 J 245 kJ/mol 1.64 x 10-18 J Since the energy of one photon is given by E = hc/λ, the nergy of a mole of photons is given by E = NAhc/λ (Where NA is Avogadro's number.) The first ionization potential of sodium is 495 kJ/mol. What is the maximum wavelength of light that will produce photoelectrons from sodium? 363 nm 484 nm 121 nm 242 nm Since λ = hc/E, (6.626 x 10-34 J s)(2.998 x 108 m/s) 6.022 x 1023 kJ 109 nm λ = ------------------------------------ * ------------ * ------ * ------ 495 kJ/mol mol 1000 J m Back to the Chem 1102 page? Patrick E. Fleming California State University, East Bay patrick.fleming@csueastbay.edu
What is the energy (E) of a mole of photons of light with a wavelength of 488 nm? 20492 cm-1 4.07 x 10-19 J 245 kJ/mol 1.64 x 10-18 J Since the energy of one photon is given by E = hc/λ, the nergy of a mole of photons is given by E = NAhc/λ (Where NA is Avogadro's number.) The first ionization potential of sodium is 495 kJ/mol. What is the maximum wavelength of light that will produce photoelectrons from sodium? 363 nm 484 nm 121 nm 242 nm Since λ = hc/E, (6.626 x 10-34 J s)(2.998 x 108 m/s) 6.022 x 1023 kJ 109 nm λ = ------------------------------------ * ------------ * ------ * ------ 495 kJ/mol mol 1000 J m Back to the Chem 1102 page? Patrick E. Fleming California State University, East Bay patrick.fleming@csueastbay.edu
The first ionization potential of sodium is 495 kJ/mol. What is the maximum wavelength of light that will produce photoelectrons from sodium? 363 nm 484 nm 121 nm 242 nm Since λ = hc/E, (6.626 x 10-34 J s)(2.998 x 108 m/s) 6.022 x 1023 kJ 109 nm λ = ------------------------------------ * ------------ * ------ * ------ 495 kJ/mol mol 1000 J m Back to the Chem 1102 page?
(6.626 x 10-34 J s)(2.998 x 108 m/s) 6.022 x 1023 kJ 109 nm λ = ------------------------------------ * ------------ * ------ * ------ 495 kJ/mol mol 1000 J m