Gas Laws

Relationships Between Variables

Combined Gas Law

Gas Laws

Relationships Between Variables

Learning Target 3.2.2: I can explain the relationships between volume of a gas, its temperature and its pressure using Boyle’s Law, Charles’s Law, Gay-Lussac’s Law, and the Combined Gas Law and how changing one variable affects the others.

Combined Gas Law

Goal 3.2.2.g I can calculate the change in temperature, volume or pressure of a gas in a closed system if I know the change in the other variables using P1V1/T1 = P2V2/T2 (Combined Gas Law)

We know about Boyle’s Law, Charles’s Law, and Gay-Lussac’s Laws and the relationships between volume, pressure, and temperature when one of those variables is held constant, but what do we do when multiple variables are changing and there is no constant? We can combine the three laws into one mathematical expression. We call this the Combined Gas Law.

Watch a video explaining the Combined Gas Law^[1]

Complete an online tutorial on how to use the Combined Gas Law (flash based)^[2]

Watch a video explaining how to rearrange the Combined Gas Law^[3]

Here is a handout to help you rearrange the Combined Gas Law^[4]

Here is a worksheet to practice problems using the Combined Gas Law^[5]

Here is a link to online practice problems using the Combined Gas Law^[6]