## Use of the Ideal Gas law vs Combined Gas Law

$PV=nRT$

Brian Kwak 1D
Posts: 88
Joined: Fri Sep 28, 2018 12:17 am

### Use of the Ideal Gas law vs Combined Gas Law

I am confused of when to use the Combined Gas Law. I know that if I am give moles and other information that I can calculate for Pressure, Temperature, or Volume, but when would I have to use the Combined Gas Law? If they change the variable and ask a question where the volume and temperature changes would I then have to use the Combined Gas Law? I thank you in advance for y’all’s help.

Annalyn Diaz 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: Use of the Ideal Gas law vs Combined Gas Law

I know that the combined gas law has more restrictions than the ideal gas law, such as the fact that moles (n) has to stay constant. In this sense, this is why the ideal gas law is used more often in regards to equilibrium.

Brian Kwak 1D
Posts: 88
Joined: Fri Sep 28, 2018 12:17 am

### Re: Use of the Ideal Gas law vs Combined Gas Law

Thank You for the clarification! So, can I assume that if Professor Lavelle asks a question pertaining to finding Pressure, Temperature, Moles, or Volume to use the Ideal gas constant to calculate it, if I am given the other variables?