Ideal vs Real Gas


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Courtney McHargue 1I
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Joined: Fri Sep 28, 2018 12:17 am

Ideal vs Real Gas

Postby Courtney McHargue 1I » Wed Jan 09, 2019 10:14 am

What's the physical and chemical difference between ideal and real gases?

Ashley Kim
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Joined: Fri Sep 28, 2018 12:19 am
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Re: Ideal vs Real Gas

Postby Ashley Kim » Wed Jan 09, 2019 10:17 am

Ideal gases and real gases have no physical/chemical differences!

Rather, ideal gases are theoretical (meaning they do NOT exist). They fit perfectly into the equation PV=nRT, meaning that their particles obtain a negligible volume and have no attractive forces. However, this is not true for real gases (which do exist). Gas particles obtain a small volume, and they have small attractive forces.

Christopher Anisi 2K
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Joined: Fri Sep 28, 2018 12:21 am

Re: Ideal vs Real Gas

Postby Christopher Anisi 2K » Wed Jan 09, 2019 3:20 pm

In addition, ideal gases are supposed to have elastic collisions with their respective molecules meaning that no energy is lost when they interact with one another! A real gas acts like an ideal gas during the conditions of high temperature and a low pressure.

Philipp_V_Dis1K
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Joined: Fri Sep 28, 2018 12:20 am

Re: Ideal vs Real Gas

Postby Philipp_V_Dis1K » Wed Jan 09, 2019 4:06 pm

One could use the van der waals equation to see the difference between real and ideal gases.

haleyervin7
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

Re: Ideal vs Real Gas

Postby haleyervin7 » Wed Jan 09, 2019 10:23 pm

For purposes of calculation, do we always assume it is an ideal gas?

lindsey_ammann_4E
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Joined: Fri Sep 28, 2018 12:26 am

Re: Ideal vs Real Gas

Postby lindsey_ammann_4E » Thu Jan 10, 2019 10:12 am

haleyervin7 wrote:For purposes of calculation, do we always assume it is an ideal gas?

For the purposes of this class, we need to assume that a gas is an ideal gas in order to use the idea gas equation. If the problem requires calculations, it's safe to assume it's an ideal gas.

Jonny Schindler 1A
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Joined: Fri Sep 28, 2018 12:20 am

Re: Ideal vs Real Gas

Postby Jonny Schindler 1A » Thu Jan 10, 2019 11:39 am

The equation for the ideal gas law can be modified to correct for characteristics of a specific gas. It can incorporate the attraction between gas molecules as well as the volume of the gas molecules.


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