Work Function

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Rebekah Kaufman 1L
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Joined: Fri Apr 06, 2018 11:03 am
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Work Function

Postby Rebekah Kaufman 1L » Sun Apr 22, 2018 10:52 pm

In most of the problems I've seen, the work function always seems to be something given, is it ever something that we will need to calculate ourselves? If we do calculate it ourselves, do convert our answer from joules to electron-volts?

Jaquelinne Rodriguez-Lopez 1L
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Re: Work Function

Postby Jaquelinne Rodriguez-Lopez 1L » Sun Apr 22, 2018 10:59 pm

The SI unit for the work function is Joules (J). If you're given e-volts, then you would have to convert the unit to joules.

Jose Munoz 1D
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Joined: Tue Nov 14, 2017 3:00 am

Re: Work Function

Postby Jose Munoz 1D » Sun Apr 22, 2018 11:24 pm

Work function can be given in Joules or as eV, however from the information given in the question we can find the work function. Work function is just the amount energy required to separate an electron from the metal.

Elana Weingord 1C
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Re: Work Function

Postby Elana Weingord 1C » Fri Apr 27, 2018 3:57 pm

There could be a problem where you are given the light energy and the energy from the electrons and will have to find the work function.

Yeo Bin Yook 1K
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: Work Function

Postby Yeo Bin Yook 1K » Fri Apr 27, 2018 4:16 pm

Generally, it is useful to know that kinetic energy is equal to hv-(work function) so even though work function is not given it should be easy to use other given information to figure it out.

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