Question

What is the average rate of the reaction from 120-200 seconds?

Answer 1

Given:

The amount at 120 secs and 200 secs is respectively,

`\begin{gathered} A(120)=0.06 \\ A(200)=0.04 \end{gathered}`

To find: The average rate of the reaction from 120 to 200 seconds.

Step-by-step explanation:

Using the average rate of change formula,

`Average\text{ rate =}(f(b)-f(a))/(b-a)`

Here, a = 120 and b = 200.

Substituting the above values we get,

`\begin{gathered} Average\text{ rate}=(A(200)-A(120))/(200-120) \\ =(0.04-0.06)/(200-120) \\ =(-0.02)/(80) \\ =-0.00025 \end{gathered}`

Final answer:

The average rate of the reaction is -0.00025mol/L/sec.