Question

Explain the difference between the instantaneous rate of a reaction and the average rate of a reaction.

Answer 1

Difference between instantaneous rate and average rate of a reaction.

Instantaneous rate	Average rate
It is defined as the change in concentration of the components of a reaction at a very small interval of time.	It is defined as the change in concentration of the components of reactants over a finite time period.
Instantaneous rate is for a point of time in a reaction when $t\to 0.$	The time interval is large to get the large value of change in concentration of a product or a reactant.
${\text{Rate}}_{Instantaneous}$ $=-\frac{d\left[R\right]}{dt}.$ $=dP/dt$	${\text{Rate}}_{Avg}$ $=-△R/△T$ $=△P/△T$