## 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

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

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

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

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

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

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

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