First and Second Order Reaction Graphs


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Emilie Flores 2G
Posts: 15
Joined: Fri Sep 25, 2015 3:00 am

First and Second Order Reaction Graphs

Postby Emilie Flores 2G » Fri Feb 05, 2016 9:23 pm

In lecture today, Lavelle graphed the first order reaction ln[A] vs time and it was downward sloping and linear. The second order reaction is 1/[A] vs time and is ALSO linear, but upward sloping. Are the slopes for a first order always negative and the slopes for the second order reactions always positive? If not, how can I differentiate the graphs?

Shaye Busse 3B
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: First and Second Order Reaction Graphs

Postby Shaye Busse 3B » Fri Feb 05, 2016 10:06 pm

In the derivation for the first order equation, the negative remains throughout. This makes the final graph of ln[A] vs. time negative and linear. In the derivation for the second order reaction, the negative is phased out. The result of this is a final graph of 1/[A] vs. time positive and linear.


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