Chapter 16, Problem 16.3P

(a)

Interpretation Introduction

Interpretation:

The mean residence time of the given $E\left(T\right)$ curve is to be stated.

Concept introduction:

The mean residence time is calculated to predict the various amount of time of all the molecules in which they reside in the body. It is denoted by $t_m$. The mean residence time requires identifies the timing of those molecules which resides for the shorter time or for the longer time.

(b)

Interpretation Introduction

Interpretation:

The variance of the given reactor is to be stated.

Concept introduction:

The probability of the deviation for the random variable to its mean position which is having square is known as variance, it is denoted by ${\sigma }^2$.