Accounting for Mass
When is Accounting for Mass Covered?
Accounting for Mass is introduced in ENGR112 during
Class 22.1*
*Explaination
of Class numbering System
Objectives
| Class 22.1: |
Accounting for Mass |
|
Understand that mass is conserved,
yet can accumulate/deplete and can enter/leave system |
|
Apply the UAE to account for mass
|
| |
Understand definitions for conserved
quantities, steady state, and extensive properties |
|
Understand how many equations
are necessary to solve for unknown quatities |
|
Use mass accounting to simultaneously
solve for up to three unknown quantities |
|
Be able to write systems of equations
in Matrix form |
|
Understand the Excel commands
Minverse() and Mnult() |
| |
Be able to solve systems
of equations using Excel |
Class Agenda
| Class 22.1: |
Accounting for Mass |
|
Lecture material on
accounting for mass |
|
Individual exercise |
| |
Lecture material on mass balance
approach |
|
Example of mass balance |
|
Lecture material on rate processes |
| |
Pairs exercise |
|
Lecture material on
solving systems of equations in Excel |
|
5 min team exercise |
| |
Excel example of matrices |
| |
5 min pair exercise |
| |
HW assignment |
Why is Accounting for Mass Important?
Many engineers work with processes or systems where
materials are mixed, seperated or distributed, and must be accounted
for. Using accounting for mass concepts and the Universal Accounting
Equation can aid in understanding and describing these complex processes
and situations.
Mass can be accounted for because it can neither
be created nor destroyed.
|
