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<p>Dr. Pounds, </p>
<p><br>
</p>
<p>On question 15.23, I am using the equation: Kp=Kc(RT)^Δn</p>
<p>Kc= 1.8x10^-5</p>
<p>R=.08206</p>
<p><span id="ms-rterangepaste-start">T=623</span></p>
<p>Δn=1</p>
<p>so the overall equation is</p>
<p>Kp=(1.8x10^-5)[(.08206)(623)]^1</p>
<p>which equals to: </p>
<p>9.20x10^-4</p>
<p>but the actual answer is: 3.5x10^-7</p>
<p>what am I doing wrong?</p>
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<font face="serif">You are correct on the following things...<br>
<br>
<img style="vertical-align: middle"
src="cid:part1.02080309.00080301@mercer.edu" alt="$K_p = K_c
(RT)^{\Delta n}$"><br>
<br>
<img style="vertical-align: middle"
src="cid:part2.00050607.02050506@mercer.edu" alt="$\Delta n$"> =
1<br>
<br>
but if you read the problem carefully they are giving you <img
style="vertical-align: middle"
src="cid:part3.07040805.00060709@mercer.edu" alt="$K_p$"> and
asking you to come up with <img style="vertical-align: middle"
src="cid:part4.02030306.00080105@mercer.edu" alt="$K_c$">, so
the equation<br>
is rearranged to <br>
<br>
<img style="vertical-align: middle"
src="cid:part5.00060608.00030105@mercer.edu"
title="\documentclass{article}
\usepackage[utf8x]{inputenc}
\pagestyle{empty}
\begin{document}
$K_c = \frac{K_p}{(RT)^{\Delta n}}$ %this is where your LaTeX
expression goes
\end{document}
" alt="\documentclass{article}
\usepackage[utf8x]{inputenc}
\pagestyle{empty}
\begin{document}
$K_c = \frac{K_p}{(RT)^{\Delta n}}$ %this is where your LaTeX
expression goes
\end{document}
"></font><font face="serif"><br>
<br>
If you then substitute in the values for <img
style="vertical-align: middle"
src="cid:part3.07040805.00060709@mercer.edu" alt="$K_p$">, <img
style="vertical-align: middle"
src="cid:part7.08020506.05080805@mercer.edu" alt="$R$">, and <img
style="vertical-align: middle"
src="cid:part8.01070106.06060507@mercer.edu" alt="$T$"> that you
used you should come up with the same value found in the book.<br>
<br>
Make sense?<br>
</font>
<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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