Module Question #32

Moderators: Chem_Mod, Chem_Admin

MCalcagnie_ 1D
Posts: 55
Joined: Wed Sep 30, 2020 10:08 pm

Module Question #32

Postby MCalcagnie_ 1D » Mon Oct 19, 2020 10:30 pm

Hi! I don't know why but I am stuck on question 32B on the Module Post-Assessment, it seems like we are only given one number and I don't know how to begin to solve, if someone could help that would be great!!

Akshata Kapadne 2K
Posts: 73
Joined: Wed Sep 30, 2020 9:40 pm

Re: Module Question #32

Postby Akshata Kapadne 2K » Mon Oct 19, 2020 10:58 pm

Which module are you referring to?

MCalcagnie_ 1D
Posts: 55
Joined: Wed Sep 30, 2020 10:08 pm

Re: Module Question #32

Postby MCalcagnie_ 1D » Tue Oct 20, 2020 9:45 am

Photoelectric Effect Module!

Akshata Kapadne 2K
Posts: 73
Joined: Wed Sep 30, 2020 9:40 pm

Re: Module Question #32

Postby Akshata Kapadne 2K » Tue Oct 20, 2020 12:45 pm

For #32, you use the information given in #31 as well, since it states that both problems refer to the same metal. In #31, it tells us that 3.607 x 10^-19 J is required to remove an electron from a metal surface, so this is our work function. In #32, it tells us that the kinetic energy is 4.200 x 10^-19 J. Now you can use the Ephoton-work function=Ek equation to find the energy of the photon. To find the wavelength, set the energy you found equal to hc/lambda (aka hv) and solve for lambda.

MCalcagnie_ 1D
Posts: 55
Joined: Wed Sep 30, 2020 10:08 pm

Re: Module Question #32

Postby MCalcagnie_ 1D » Tue Oct 20, 2020 1:05 pm

Oh that's a lot clearer now! Thank you so much!


Return to “Photoelectric Effect”

Who is online

Users browsing this forum: No registered users and 1 guest