Q29 from PhotoElectric Effect Post-Module Assessment

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Swetha Sundaram 1E
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Joined: Fri Sep 29, 2017 7:04 am
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Q29 from PhotoElectric Effect Post-Module Assessment

Postby Swetha Sundaram 1E » Thu Oct 12, 2017 10:41 am

Hi! This may seem like a silly question, but I wasn't too sure about how to go about solving this problem.
The question is:
Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1.
How much energy is required to remove an electron from one sodium atom?

I just converted 150.6 kJ/mol into kJ/atoms using Avogadro's number and then brought kJ into J. Is this correct?

Vincent Grospe 3C
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Re: Q29 from PhotoElectric Effect Post-Module Assessment

Postby Vincent Grospe 3C » Thu Oct 12, 2017 11:41 am

Yes, you use stoichiometry to convert kJ/mol to kJ/atoms using Avogadro's number.

There was another discussion thread about this on Chem Community for additional details: viewtopic.php?t=2344

Hope this helps!


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