R constant in Ideal Gas Law


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Kayla Maldonado 1C
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R constant in Ideal Gas Law

Postby Kayla Maldonado 1C » Sun Jan 19, 2020 12:16 am

How do we know what units to use for the R constant in the Ideal Gas Law?

Lara Kristine Bacasen 1L
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Re: R constant in Ideal Gas Law

Postby Lara Kristine Bacasen 1L » Sun Jan 19, 2020 12:20 am

It should say it on the equation sheet.

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

Re: R constant in Ideal Gas Law

Postby Hui Qiao Wu 1I » Sun Jan 19, 2020 9:15 am

When you plug in all the variables in the pv=nRT equation, you want to make sure all the units cancel out. The correct unit should give you only moles or some kind of pressure unit at the end (after the cancellation of units).

Dan M -3E
Posts: 101
Joined: Wed Sep 18, 2019 12:19 am

Re: R constant in Ideal Gas Law

Postby Dan M -3E » Sun Jan 19, 2020 5:55 pm

R= 8.314 J/mol*K if the units we're using is atms, which is usually is.

Noe BM 1J
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Joined: Sat Sep 07, 2019 12:17 am

Re: R constant in Ideal Gas Law

Postby Noe BM 1J » Sun Jan 19, 2020 9:33 pm

I think the question would state which units you need to use. If not, pay attention to the units of pressure. For example, if you are given the pressure in order to find the volume, you should use the R constant that has the same units as pressure in order for them to cancel out each other.


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