Rate Order Graphs

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Emily Ng_4C
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Rate Order Graphs

Postby Emily Ng_4C » Fri Mar 08, 2019 2:34 pm

What is the logic behind choosing the model with the most linear graph as the rate order?

Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

Re: Rate Order Graphs

Postby Mya Majewski 1L » Fri Mar 08, 2019 2:43 pm

look at what the x-axis and y-axis are and if its linear, its likely that order. For example, ln[A] vs. t if thats linear, its likely 1st order.
If you search on Google there are super helpful charts that break down 1st, 2nd, and zero order in terms of linear plot to determine the rate order and the exponential graphs that show concentration vs. time!

Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: Rate Order Graphs

Postby anthony_trieu2L » Fri Mar 08, 2019 3:36 pm

If you are only given the reactant concentrations and their respective times, you can use graphs to determine the order of each reactant. For example, if the graph of ln[A] vs. time is linear, it is first order. In addition, if [A] vs. time is linear, then it is zero order.

Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Rate Order Graphs

Postby lindsey_ammann_4E » Mon Mar 11, 2019 4:16 pm

i find this diagram pretty helpful in determining order: (shows zero, first, and second order graphs respectively)

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