What is the order of the reaction?  [ENDORSED]

Moderators: Chem_Mod, Chem_Admin

Wayland Leung
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

What is the order of the reaction?

Postby Wayland Leung » Tue Feb 27, 2018 11:21 pm

What does the "order" of a reaction mean? What is the difference between a first, second, third, or zeroth order reaction?

Nicole 1F
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

Re: What is the order of the reaction?

Postby Nicole 1F » Tue Feb 27, 2018 11:35 pm

The order of your reaction is the n value. It shows up in the differential rate law where
Rate=k[R]^n (so n=0 in a zero order reaction, n=1 in a 1st order reaction, etc)

Cynthia Tsang
Posts: 52
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

Re: What is the order of the reaction?

Postby Cynthia Tsang » Wed Feb 28, 2018 12:03 am

If there are multiple reactants, you add up the exponents to find the total order of the reaction.

Erica Nagase 1H
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

Re: What is the order of the reaction?

Postby Erica Nagase 1H » Thu Mar 01, 2018 10:15 am

The order of a reaction is the sum of the individual orders with respect to each reactant, and it tells you about the relationship between reactant concentrations and rate.

Jessica Benitez 1K
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: What is the order of the reaction?  [ENDORSED]

Postby Jessica Benitez 1K » Fri Mar 02, 2018 6:55 pm

In class we also discussed the different plots that go with each reaction:
First order means a straight line plot of ln[reactant] vs time
Second order means a straight line plot of 1/[reactant] vs time
Zero order means a straight line plot of [reactant] vs time

[reactant] means concentration of the reactant


Return to “Method of Initial Rates (To Determine n and k)”

Who is online

Users browsing this forum: No registered users and 2 guests