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<div class="moz-cite-prefix">On 11/11/2018 04:04 PM, wrote:<br>
</div>
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<p style="margin-top:0;margin-bottom:0">Hello, Dr. Pounds,</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">In the atomic spectra
lab when we are finding the photon energy in kJ/mol, how are
we to find that when if we use the energy equation our final
unit is Joules, which we can only convert to kilojoules. Is
there a specific amount of Hg and Na salt used in the lamps we
can use to calculate number of moles? Thank you</p>
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<p><br>
</p>
<p>The first thing you need to do is prepare a CALIBRATION PLOT for
you mercury lines. I updated the example calibration plot on the
class website for this lab. It is available at</p>
<p><br>
</p>
<p><a class="moz-txt-link-freetext" href="http://theochem.mercer.edu/chm111/atomspec2.png">http://theochem.mercer.edu/chm111/atomspec2.png</a></p>
<p><br>
</p>
<p>You make ONLY ONE calibration plot because you only have absolute
emission data for one set of lines -- mercury.</p>
<p><br>
</p>
<p>Using the Mercury Calibration plot, determine the wavelength, in
nm, for you other lines species -- record these in column 4.</p>
<p><br>
</p>
<p>For the mercury spectrum and the sodium salt you are asked to
come up with the energy of the transition in kJ/mol. The equation
<img alt="$E=\frac{hc}{\lambda}$" style="vertical-align: middle;"
src="cid:part1.DDEFE2AF.2513FF7F@mercer.edu">, where <img
alt="$\lambda$" style="vertical-align: middle;"
src="cid:part2.FFA7992F.EA43461D@mercer.edu"> is in meters,
allows you to convert the energies to Joules per photon. To
convert to kJ/mol, multiply this number by Avogadro's number and
divide by 1000.</p>
<p><br>
</p>
<p><br>
</p>
<p>Lab this week has four components:</p>
<p><br>
</p>
<p>1. Cover Page (nothing in box)<br>
</p>
<p>2. Filled out report form</p>
<p>3. Calibration Graph</p>
<p>4. Copies from your lab notebook.</p>
<p><br>
</p>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
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