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heisenberg, calculating kinetic energy

Posted: Thu Oct 17, 2019 10:05 pm
by Katherine Wu 1H
Use the uncertainty in velocity (3.4x10^10 m/s) to calculate the electron's uncertainty in kinetic energy. Then calculate the uncertainty in kinetic energy per mole of electrons (that is, per mole of hydrogen atoms).

I'm not quite sure where to start. I tried plugging the velocity and mass of electron into KE=1/2mv, but that didn't work.

Re: heisenberg, calculating kinetic energy

Posted: Thu Oct 17, 2019 10:46 pm
by Chem_Mod
Make sure that the velocity in your kinetic energy equation is squared.

Re: heisenberg, calculating kinetic energy

Posted: Fri Oct 18, 2019 11:27 am
by Alex Hitti 3E
I think it isn't working because there is a small error in your formula.
The equation for kinetic energy: KE = (0.5)*mass*velocity^2.
Also, another equation you will need later on: ΔxΔp >= h/(4pi)

Re: heisenberg, calculating kinetic energy

Posted: Fri Oct 18, 2019 6:42 pm
by ValerieChavarin 4F
It could be due because your velocity is not squared.