reaction rate vs average reaction rate

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Jorja De Jesus 2C
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Joined: Sat Jul 20, 2019 12:15 am

reaction rate vs average reaction rate

Postby Jorja De Jesus 2C » Sun Mar 08, 2020 11:49 pm

What is the difference between the reaction rate and the average reaction rate if the reaction rate is also considered an average of the change in concentration? Wouldn't they both be the same even if the average reaction rate is measured on an interval?

805307623
Posts: 99
Joined: Fri Aug 09, 2019 12:17 am

Re: reaction rate vs average reaction rate

Postby 805307623 » Sun Mar 08, 2020 11:52 pm

The initial rate is the instantaneous rate of reaction as it starts, so just as product just begins to form. The average reaction rate is the average of the instantaneous rates over a time period.

Alice Ma 2K
Posts: 52
Joined: Wed Nov 13, 2019 12:26 am

Re: reaction rate vs average reaction rate

Postby Alice Ma 2K » Mon Mar 09, 2020 1:53 am

The instantaneous rate is over a very short period of time, whereas the average reaction rate is over the entirety of the reaction.

305385703
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Joined: Thu Jul 11, 2019 12:15 am

Re: reaction rate vs average reaction rate

Postby 305385703 » Mon Mar 09, 2020 11:13 am

The reaction rate at a certain point is the instantaneous rate of change, or the tangent line to the curve. The average reaction rate is the rate of change over two points.

Vicki Liu 2L
Posts: 101
Joined: Sat Aug 24, 2019 12:15 am

Re: reaction rate vs average reaction rate

Postby Vicki Liu 2L » Mon Mar 09, 2020 11:18 am

Mathematically, there is a difference in which initial rate and average rate are solved/represented:
Average rate = change in [A] / change in time (for two distant points)
Initial rate = d[A]/dt (where d represents a very small deviation)
Note that initial rate is the one you would use the rate law equation for.

Elizabeth Harty 1A
Posts: 125
Joined: Sat Jul 20, 2019 12:16 am

Re: reaction rate vs average reaction rate

Postby Elizabeth Harty 1A » Mon Mar 09, 2020 11:25 am

How do we apply these different rates?


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