units for partial pressure of gases


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Julia Lee
Posts: 80
Joined: Fri Sep 28, 2018 12:29 am

units for partial pressure of gases

Postby Julia Lee » Wed Jan 23, 2019 8:23 am

Hey,

Do any of you guys know whether we should use bar or atm when calculating the partial pressures of gases?
My TA said to always convert to bars but a UA said that Lavelle prefers atm.

Seohyun Park 1L
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: units for partial pressure of gases

Postby Seohyun Park 1L » Wed Jan 23, 2019 9:12 am

I believe you can use either. I would say use the units it gives in the problem? I don't think I encountered problems in the textbook that gave different units for gases.

Brandon Mo 4K
Posts: 70
Joined: Fri Sep 28, 2018 12:15 am

Re: units for partial pressure of gases

Postby Brandon Mo 4K » Wed Jan 23, 2019 7:10 pm

I don’t think you have to convert to bars. I think it’s recommend to stick with the units that are given in the questions.

Searra Harding 4I
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Re: units for partial pressure of gases

Postby Searra Harding 4I » Wed Jan 23, 2019 8:05 pm

Use the units given in the question. I don't think we're expected to convert. How do you convert atm to bars?

GavinAleshire1L
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

Re: units for partial pressure of gases

Postby GavinAleshire1L » Sat Jan 26, 2019 11:59 pm

1 atm = 1.01325 bar so you could just use dimensional analysis and this conversion factor.

David Effio 1H
Posts: 38
Joined: Wed Feb 14, 2018 3:01 am

Re: units for partial pressure of gases

Postby David Effio 1H » Sun Jan 27, 2019 12:02 am

I believe if units are given in a problem, use the units given. In any case that you must convert from concentration to Ppressure using the ideal gas law, I would stick to using atmospheres, since Lavelle since to prefer using that.

jocelyntzeng
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: units for partial pressure of gases

Postby jocelyntzeng » Sat Mar 16, 2019 1:06 pm

i think both are ok just be careful when using R values


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