Units
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Units
I was wondering why when we calculate partial pressure the answer could be either in bars or moles per liter. Is there any unit out of the two that is preferred?
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Re: Units
I have heard Dr. Lavelle say we will use either bars or atm since they do not vary significantly in their value.
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Re: Units
I think we can figure out which unit to use from the units of the provided information (or maybe that's just for R when using the ideal gas law).
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Re: Units
Because 1 bar is approximately equal to 1 atm we use both and don't necessarily prefer one over the other. However, I do believe the SI unit is bar
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Re: Units
I think for this course, we'll mostly use atm as units for pressure, but since 1 bar is approximately equal to 1 atm, we'll use bar as well.
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Re: Units
Eileen Quach Dis 2A wrote:I was wondering why when we calculate partial pressure the answer could be either in bars or moles per liter. Is there any unit out of the two that is preferred?
Usually the units preferred are given in the question or you can deduce the best units from the units given! Sometimes on tests as well Dr. Lavelle will specify which units to use in answer.
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Re: Units
Bar is the SI unit for the gas pressure and 1 bar is very close to 1 atm so we can use either of them, when the gas is presented in mols per liter it is showing its concentration and can be converted to pressure through ideal gas law.
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Re: Units
I think we will either use bars or atm, since they are similar in value, but I think the units would just depend on the problem.
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Re: Units
The preferred unit will be atm! You should not give an answer in moles per liter as that would be the unit for concentration rather than pressure. You can easily convert between the two as Dr. Lavelle taught in lecture.
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Re: Units
I think either bars or atm would work since they are similar. Most likely tho, Lavelle would tell us regarding the specific problem.
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Re: Units
i don't think there is a preference as long as your value is correct. but usually we use atm or bars out of convenience.
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Re: Units
I believe bars and atm are very similar, so it would probably just depend on the problem and the units given.
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