Chapter 16.1, Problem 7SSC

Interpretation Introduction

Interpretation:

The reason of dependence of average rate of a reaction on the length of the time interval needs to be explained.

Concept introduction:

Chemical kinetic is the branch of chemistry that deals with kinetic or rate of a chemical reaction. The rate of reaction can be defined as the change in the concentration of reactant and product with time. The rate of reaction mainly depends on the activation energy.

Answer to Problem 7SSC

$\text{Average rate = }\frac{\text{Δ[A]}}{\text{Δt}}$

Explanation of Solution

Given information:

The average rate of reaction depends on the time interval.

The average rate of reaction represents the change in concentration of reactant with change in time.

It can be written as:

$\text{Average rate = }\frac{\text{Δ[A]}}{\text{Δt}}$

Here:

• A = reactant
• t = time

Thus average rate is the change in concentration of reactant with time therefore it is inversely proportional to change in the time interval.

Conclusion

$\text{Average rate = }\frac{\text{Δ[A]}}{\text{Δt}}$