Sapling 23
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Sapling 23
Could someone help me understand exactly how to break down this question and set up the equation?
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Re: Sapling 23
First, you need to determine E using E = hc/wavelength (use 1064x10^-9) for wavelength. You would get 1.867x10^-19. Then you use the conversion for Joules to eV by dividing E by 1.602x10^-19 to get 1.165eV. Electron affinity is the difference between the incident radiation from the laser and the measured energy of the electrons(0.137eV). So 1.165-0.137=1.028 eV/atom
For the second part just use your conversion factors to change 1.028eV/atom to kJ/mol
1.028(1.602x10^-19)(1/1000)(6.022x10^23)=99.21kJ/mol
For the second part just use your conversion factors to change 1.028eV/atom to kJ/mol
1.028(1.602x10^-19)(1/1000)(6.022x10^23)=99.21kJ/mol
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Re: Sapling 23
Valerie explained it perfectly!
Just find the energy of the light, convert it to eV, subtract the experimentally measured energy of ejected electrons, then convert the electron affinity to kJ/mole.
Just find the energy of the light, convert it to eV, subtract the experimentally measured energy of ejected electrons, then convert the electron affinity to kJ/mole.
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