Chapter 4, Problem 4.38P

Interpretation Introduction

Interpretation:

The maximum number of balance equations that can be written for each of the subsystems given are to be stated and the order of these equations to be solved for the unknown variables is to be determined.

Concept introduction:

In a system, a conserved quantity (total mass, mass of a particular species, energy or momentum) is balanced and can be written as:

$\text{input}+\text{generation}-\text{output}-\text{consumpumtion}=\text{accumulation}$

Here, ‘input’ is the stream which enters the system. ‘generation’ is the term used for the quantity that is produced within the system. ‘output’ is the stream which leaves the system. ‘consumption’ is the term used for the quantity that is consumed within the system. ‘accumulation’ is used for the quantity which is builds up within the system.

All the equations which are formed are then solved simultaneously to calculate the values of the unknown variables.