## Ideal Gas meaning

$PV=nRT$

Andrew F 2L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

### Ideal Gas meaning

What does it mean when a gas acts ideally? Is it just that the gas itself follows pv=nRT? What would a gas that didn't act ideally look like and will we be working with those gases in this course? Thank you!

Kevin Antony 2B
Posts: 99
Joined: Sat Sep 07, 2019 12:16 am

### Re: Ideal Gas meaning

At low temperatures, most gases are going to act ideally. In this course, we'll probably only deal with ideal gases because this allows for us to apply PV=nRT and infer molecular kinetic energy based on temperature.

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### Re: Ideal Gas meaning

Kevin Antony 2B wrote:At low temperatures, most gases are going to act ideally. In this course, we'll probably only deal with ideal gases because this allows for us to apply PV=nRT and infer molecular kinetic energy based on temperature.

How do we know when to apply the ideal gas equation in a problem?

Posts: 103
Joined: Sat Aug 17, 2019 12:18 am

### Re: Ideal Gas meaning

Kevin Antony 2B wrote:At low temperatures, most gases are going to act ideally. In this course, we'll probably only deal with ideal gases because this allows for us to apply PV=nRT and infer molecular kinetic energy based on temperature.

How do we know when to apply the ideal gas equation in a problem?

The ideal gas equation will help us convert pressure to volume and vice versa as we can manipulate it to express P=(Conc)RT (P=nRT/V) or Conc=P/RT (n/V=RT). This is useful in situations where we have to calculate the Kc of a reaction but are given pressures or if we have to calculate the Kp of a reaction and are given concentrations.

Matt F
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Joined: Sat Aug 17, 2019 12:17 am

### Re: Ideal Gas meaning

If we are required to convert between pressure and concentration or vice versa, you should be safe using the Ideal Gas Law. Ideal gases were not heavily discussed in class so it should be fairly safe to use the equation when necessary to convert

Timmy Nguyen Dis 1I
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### Re: Ideal Gas meaning

basically, when a gas is ideal, use PV = NRT, but in reality, things are slightly different due to the many different factors that are present.

Diana A 2L
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### Re: Ideal Gas meaning

I have a question about the conditions required for an “ideal gas”. When something is at standard STATE conditions, which is considered 25 degrees Celsius and 1 atm, does the Ideal Gas Equation apply?

Leila_4G
Posts: 114
Joined: Sat Sep 14, 2019 12:17 am

### Re: Ideal Gas meaning

That's a good question, I've been wondering the same thing! Thank you!

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