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Steelflight-Rx
United States1389 Posts
*Laser at "x" nm, incident power of "y" watts *"z" moles photochemical product after "t" seconds *%T = "%T" all of those variables are given, how would I find the quantum yield? I read through the section like 3 times and it still makes no sense, and my teacher is gone to bed by now..  | ||
micronesia
United States24753 Posts
Q= photons emitted/photons absorbed is that related to the givens? | ||
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GrayArea
United States872 Posts
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GrayArea
United States872 Posts
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GrayArea
United States872 Posts
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Steelflight-Rx
United States1389 Posts
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Steelflight-Rx
United States1389 Posts
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micronesia
United States24753 Posts
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LiAlH4
New Zealand111 Posts
then (assuming all photons incident on the sample are absorbed): number of photons = Power (J/s) / Energy of a photon (J) (E = hc/wavelength) number of molecules = n (mol) * Na (1/mol) / t (s) T% = num molecules (molecules/s) / number of photons (photons/s) | ||
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Steelflight-Rx
United States1389 Posts
On October 08 2008 12:53 LiAlH4 wrote: Assuming quantum yield is just molecules product/photons absorbed then (assuming all photons incident on the sample are absorbed): number of photons = Power (J/s) / Energy of a photon (J) (E = hc/wavelength) number of molecules = n (mol) * Na (1/mol) / t (s) T% = num molecules (molecules/s) / number of photons (photons/s) Thanks, thats actually the same method that I ended up using. *insert rant about how the other text book that we dont even use is way more clear than the text book our professor is writing/teaching from* ... but anyways, %T is the percent transmittance. The only thing I'm confused about is why he gave that information if we didn't end up using it.. owell, this looks pretty damn good to me, esp now that you confirmed it. | ||
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Grobyc
Canada18410 Posts
On October 08 2008 11:12 GrayArea wrote: The only people who will be able to help you are Chem majors, Biochem majors, or people who just like p-chem for some reason. So basically, you are asking a small minority on the forum. Might just be easier to e-mail the teacher =/ This is true.. If he were asking for high school chemistry or something a lot more people could probably help(including me, yay!). Luckily micronesia is a science gosu though... | ||
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micronesia
United States24753 Posts
On October 08 2008 15:30 Grobyc wrote: This is true.. If he were asking for high school chemistry or something a lot more people could probably help(including me, yay!). Luckily micronesia is a science gosu though... My Uncle is the phd in pchem not me lol | ||
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