T variable in pv=nrt


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Bryce Ramirez 1J
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T variable in pv=nrt

Postby Bryce Ramirez 1J » Sat Mar 14, 2020 9:29 pm

For the temperature in every calculation using the ideal gas formula, will it always be in Kelvin or will there be times where it is in Celcius? I know that the units have to cancel from the gas constant, but I'm not sure if there is any gas constant that requires celcius instead of Kelvin.

vpena_1I
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Re: T variable in pv=nrt

Postby vpena_1I » Sat Mar 14, 2020 9:38 pm

All gas constants are in Kelvin, so unless you really wanted to convert these to Celsius, its easier to convert Celsius to kelvin from the get-go.

Zoya Mulji 1K
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Re: T variable in pv=nrt

Postby Zoya Mulji 1K » Sat Mar 14, 2020 9:42 pm

you should probably always keep it in Kelvin just to be safe because if it cancels out it won't matter anyways.

SMIYAZAKI_1B
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Re: T variable in pv=nrt

Postby SMIYAZAKI_1B » Sat Mar 14, 2020 9:44 pm

It is better to keep it in Kelvin just because of the unit of the gas constant, R, has Temperature in Kelvin. In order to cancel out the units, you really have to make sure that units match and if you really really need Celcius, make sure to change the unit after figuring the Kelvin.

Alfred Barrion 2H
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Re: T variable in pv=nrt

Postby Alfred Barrion 2H » Sat Mar 14, 2020 10:10 pm

For simplicity, it would be easier to use Kelvin, especially since Kelvin is used in the constants.

Frank He 4G
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Re: T variable in pv=nrt

Postby Frank He 4G » Sat Mar 14, 2020 10:14 pm

We should always work in kelvin just to be safe, so I'd convert to kelvin if needed and keep it that way. If the problem asks for a value using Celsius, then convert it back at the end.

Katie Kyan 2K
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Re: T variable in pv=nrt

Postby Katie Kyan 2K » Sat Mar 14, 2020 10:39 pm

I think I would keep the units in Kelvin because this is usually what we work with and most likely the temperature will be given to you in Kelvin.

Alan Cornejo 1a
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Re: T variable in pv=nrt

Postby Alan Cornejo 1a » Sun Mar 15, 2020 6:58 am

Using kelvin is most advisable as it is an easy conversion, and it allows for the matchup of all the right units for your equation.

KHowe_1D
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Re: T variable in pv=nrt

Postby KHowe_1D » Sun Mar 15, 2020 7:17 am

Since Kelvin would be canceled out by the units of R, you should convert all temperatures to K.

Nawal Dandachi 1G
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Re: T variable in pv=nrt

Postby Nawal Dandachi 1G » Sun Mar 15, 2020 7:20 am

You should convert temperature to kelvin because you are using R which uses Kelvin.

Gurmukhi Bevli 4G
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Re: T variable in pv=nrt

Postby Gurmukhi Bevli 4G » Tue Mar 17, 2020 11:48 pm

I would keep it in Kelvin at all times, just to be safe.


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