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Order of Reaction

Posted: Sun Mar 08, 2020 11:17 pm
by Charisse Vu 1H
How do you determine if a reaction is zero, first, or second order? Is there a way to tell without looking at a graph?

Re: Order of Reaction

Posted: Sun Mar 08, 2020 11:22 pm
by Nathan Rothschild_2D
The way to tell if a reaction is a zero order reaction is when the rate is unaffected by the concentration of the reactants. First order reactions rate changes linearly based on 1 reactant concentration.

Re: Order of Reaction

Posted: Mon Mar 09, 2020 10:39 am
by smurphy1D
By looking at the rate law, a 0 order equation with be the simplest looking [A]= -kt + [A]. The first order equation always has ln before [A] so , ln[A]= -kt + ln[A]. Finally 2nd order has [A] in a fraction over 1, so 1/[A]= kt + 1/[A].

Re: Order of Reaction

Posted: Mon Mar 09, 2020 10:44 am
by Asha Agarwal 1E
Yes, by comparing equations with rates and concentrations for different experiments as we did in class you can find the exponents for the differential rate laws and the exponent directly corresponds to the order of the reaction.