Solution: An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a

An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically.

The reaction of compound A forming compound B was studied and the following data were collected:

Time (s)                    [A] (M)

0.                               0.184

200.                           0.129

500.                           0.069 

800.                           0.031

1200.                         0.019

1500.                         0.016

a. What is the average reaction rate between 0 s and 1500 s?

b. What is the average reaction rate between 500 s and 1200 s?

c. What is the instantaneous rate of the reaction at t = 800 s?