Quiz 2 Prep Winter 2012

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103978133
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Joined: Fri Sep 20, 2013 3:00 am

Quiz 2 Prep Winter 2012

Postby 103978133 » Thu Feb 27, 2014 9:25 pm

In the 4th and 5th question, how do we understand the reaction order by looking at Pt and ethylene? How do we determine the order??

ch1995
Posts: 314
Joined: Fri Sep 20, 2013 3:00 am

Re: Quiz 2 Prep Winter 2012

Postby ch1995 » Thu Feb 27, 2014 9:33 pm

I'm not sure what the exact question is (do you mind posting it?), but to determine the order of a particular reactant (Pt & ethylene in this case), look at how a change in the concentration of that reactant affect the rate of the reaction:

If you double the reactant (x2) & the rate is unchanged (x0 = x20), the reactant is zero order.
If you double the reactant (x2) & the rate doubles (x2 = x21), the reactant is first order.
If you double the reactant (x2) & the rate quadruples (x4 = x22), the reactant is second order.

To find the order of the reaction, add the orders of all the reactions up.


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