Bars vs atmospheres


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ashwathinair
Posts: 113
Joined: Sat Aug 17, 2019 12:17 am

Bars vs atmospheres

Postby ashwathinair » Sun Jan 12, 2020 12:33 pm

What is the difference between bars and atmospheres as units for finding Kp or Qp? Which one is used, and if it is either, why are both applicable?

Janet Nguy 2C
Posts: 115
Joined: Sat Aug 24, 2019 12:17 am

Re: Bars vs atmospheres

Postby Janet Nguy 2C » Sun Jan 12, 2020 12:36 pm

I believe that both are used because they are both units of pressure.

Jasmine 2C
Posts: 184
Joined: Wed Sep 18, 2019 12:18 am

Re: Bars vs atmospheres

Postby Jasmine 2C » Sun Jan 12, 2020 12:43 pm

The two are just different units of measurement. Depending on what unit is given and what unit they want in the final answer, you will need to use dimensional analysis to convert between the two. To convert between them, you need to know that 1 bar = 100 kPa (obtained from online) and 1 atm = 101.325 kPa (obtained from constant and equation sheet).

Alex Chen 2L
Posts: 86
Joined: Wed Sep 18, 2019 12:21 am

Re: Bars vs atmospheres

Postby Alex Chen 2L » Sun Jan 12, 2020 1:37 pm

In terms of Kp and Qp, the unit you use for pressure doesn't matter as long as you stay consistent because the equilibrum constant and reaction quotient are both unitless.

Rosa Munoz 2E
Posts: 105
Joined: Wed Sep 18, 2019 12:21 am

Re: Bars vs atmospheres

Postby Rosa Munoz 2E » Sun Jan 12, 2020 1:46 pm

Both are applicable

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: Bars vs atmospheres

Postby AronCainBayot2K » Sun Jan 12, 2020 1:48 pm

Both can be used for measuring pressure, depending on the context of the problem it would be good to stay consistent with the units.

Matthew Chan 1B
Posts: 111
Joined: Sat Sep 07, 2019 12:16 am

Re: Bars vs atmospheres

Postby Matthew Chan 1B » Sun Jan 12, 2020 3:04 pm

Both are units for measuring pressure. They are both okay to use, just make sure that you stay consistent with whichever unit you choose or with whatever is given in the problem.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

Re: Bars vs atmospheres

Postby Betania Hernandez 2E » Sun Jan 12, 2020 4:04 pm

Both are applicable because they are both units for measuring pressure.

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

Re: Bars vs atmospheres

Postby 005324438 » Sun Jan 12, 2020 4:30 pm

They are both units of pressure, so as long as all the units match up you should be good to go.

Radha Patel 4I
Posts: 97
Joined: Tue Feb 12, 2019 12:15 am

Re: Bars vs atmospheres

Postby Radha Patel 4I » Sun Jan 12, 2020 4:39 pm

Both are applicable because they are units of pressure. On google it says that bars is smaller than atmospheric pressure, so keep your units consistent (: .

Emil Velasco 1H
Posts: 96
Joined: Wed Nov 21, 2018 12:19 am

Re: Bars vs atmospheres

Postby Emil Velasco 1H » Sun Jan 12, 2020 4:40 pm

Both work as their respective units of measurement, mostly dealing with gasses and pressure

205154661_Dis2J
Posts: 109
Joined: Wed Sep 18, 2019 12:21 am

Re: Bars vs atmospheres

Postby 205154661_Dis2J » Sun Jan 12, 2020 5:28 pm

They are both units of pressure; I think it depends on the question and what units that specific question wants you to use.

TanveerDhaliwal3G
Posts: 105
Joined: Fri Aug 30, 2019 12:17 am

Re: Bars vs atmospheres

Postby TanveerDhaliwal3G » Sun Jan 12, 2020 5:53 pm

Bars and atmospheres are both units of pressure and you should be able to use both as long as the units are the same throughout the problem.

William Chan 1D
Posts: 102
Joined: Sat Sep 14, 2019 12:15 am

Re: Bars vs atmospheres

Postby William Chan 1D » Sun Jan 12, 2020 6:22 pm

They are both units of pressure and can be interchanged through unit conversions (like pounds and kilograms).


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