## How to tell if you're dealing with an ideal gas?

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

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Joined: Wed Sep 21, 2016 2:58 pm

### How to tell if you're dealing with an ideal gas?

In the winter 2014 final, question 2b, you're asked to calculate the final pressure of a sealed container of gases. The equation used is PV=nRT, but the problem does not specify that the gases (Argon and Neon) behave as ideal gases. How would you know that they do in order to use the ideal gas law?

Stephanie Demo 2N
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Joined: Thu Sep 29, 2016 3:00 am

### Re: How to tell if you're dealing with an ideal gas?

Argon and Neon are both noble gases, and I believe it is standard to treat noble gases like ideal gases.

Posts: 7
Joined: Wed Sep 21, 2016 2:58 pm

### Re: How to tell if you're dealing with an ideal gas?

Okay! Thank you!!

EmilyLeibovitch2E
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Joined: Wed Nov 18, 2015 3:00 am

### Re: How to tell if you're dealing with an ideal gas?

I think in 14B we have only really used ideal gasses in problems, so it's safe to assume it is an ideal gas, even if it only says gas.