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<div class="moz-cite-prefix">On 07/06/13 18:25, wrote:<br>
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<div style="direction: ltr;font-family: Tahoma;color:
#000000;font-size: 10pt;">In chapter 14 problem 42, why do the
constants not divide out to equal one? Because it says "the
reaction at 250 degrees celsius is 1.50E3 times as fast as the
same reaction at 150 degrees celsius."So aren't both the k's
1.50E3?<br>
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<br>
So let's say the rate equation is <br>
<br>
RATE = k [CO][Cl<sub>2</sub>]<br>
<br>
The problem tells us that the concentrations are the same for both
experiments; therefore if the RATE is changing by 1500 times, then
it is due to the fact that "k" is 1500 times greater at 250 K than
it is at 150 K. <br>
<br>
Now think about this, since I am going to be using the ratio of
these two k's in the equation, I don't have to actually know their
values -- just their relative sizes. When I worked the problem I
set k<sub>1</sub>=1 and k<sub>2</sub>=1500.<br>
<br>
Hope that helps. <br>
<br>
<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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