# CE-087 Calculation of Gas Density and Viscosity: 2 PDH

### Description of the Calculation of Gas Density and Viscosity course

The Calculation of Gas Density and Viscosity online PDH course is a part of the Civil Engineering category of courses.

The density and/or viscosity of a gas is often needed for some other calculation, such as pipe flow or heat exchanger calculations. This course contains discussion of, and example calculation of, the density and viscosity of a specified gas at a given temperature and pressure.

If the gas temperature is high relative to its critical temperature and the gas pressure is low relative to its critical pressure, then it can be treated as an ideal gas and its density can be calculated at a specified temperature and pressure using the ideal gas law.

If the density of a gas is needed at a temperature and pressure at which it cannot be treated as an ideal gas law, however, then the compressibility factor of the gas must be calculated and used in calculating its density. In this course, the Redlich Kwong equation will be used for calculation of the compressibility factor of a gas.

The Sutherland formula can be used to calculate the viscosity of a gas at a specified temperature and pressure if the Sutherland constants are available for the gas. It will be discussed and used in example calculations. Another method for calculating the viscosity of air at a specified temperature and pressure will also be presented and discussed. Some of the equations that will be discussed and illustrated through examples are shown below.

This course is intended for civil, chemical, mechanical and environmental engineers. After completing this course, you will have knowledge about methods for calculating the density and viscosity of a gas at specified temperature and pressure.

### Learning Objectives:

At the end of the course, you will:

- Be able to calculate the density of a gas of known molecular weight at a specified temperature and pressure at which the gas can be treated as an ideal gas.
- Be able to calculate the compressibility factor for a gas at a specified temperature and pressure, using the Redlich-Kwong equation, if the molecular weight, critical temperature and critical pressure of the gas are known.
- Be able to calculate the density of a gas at a specified temperature and pressure for which the gas cannot be treated as an ideal gas, if the molecular weight, critical temperature and critical pressure of the gas are known.
- Be able to calculate the viscosity of a gas at a specified temperature if the Sutherland constant for the gas is known and the viscosity of the gas at a suitable reference temperature is known.
- Be able to calculate the viscosity of air at specified air temperature and pressure.
- Be able to make all of the calculations described in these learning objectives using either U.S. or S.I. units.

### Refunds and Cancellation Policies

The course is accepted by the Professional Engineering boards in states listed on this page. In an unlikely case the course is not accepted by the board listed on this page, we will refund the full payment and will pay for you to take another course of equivalent monetary and PDH / CEU value. For complete list of courses related to Civil Engineering category of courses please click here.

### Length of the Course / Activity

This course is intended to be studied at self-pace and it should take on average of 2 hour to read and be able to comprehend the material to successfully past the online quiz.

### Course Quiz

To receive the certificate of completion for the above 2 PDH online course, you will need to take a 10-question multiple choice quiz based on the reference material supplied and pass with minimum score of 70%. There is no time limit for the quiz and it can be taken multiple times until a passing score of 70% is achieved.

### Certificate of Completion

Once you achieve a passing score of 70% on the quiz you will receive and be able to print your Certificate of Completion as a record of your continuing education. PDH Star will keep a record of your certificate for the duration as required by your state of licensure. You will be able to log on to your account and view and print your past Certificate of Completion.

### State Acceptance

This course is accepted in all states mandating continuing education:

AK, AL, AR, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY

For detailed state by state requirements click here.

### Need help?

Do you need help choosing the right course or package for you? Please give us a call or send us an email and we will be happy to provide guidance on which courses are most relevant for you and create a customary course package.

### Course Features

- Lectures 1
- Quizzes 1
- Duration 2 hours
- Skill level All levels
- Language English
- Students 1
- Certificate Yes
- Assessments Self

#### CE-087 Calculation of Gas Density and Viscosity