## reaction rate vs average reaction rate

Jorja De Jesus 2C
Posts: 121
Joined: Sat Jul 20, 2019 12:15 am

### reaction rate vs average reaction rate

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

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

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

305385703
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Re: reaction rate vs average reaction rate

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

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

How do we apply these different rates?