Constant Vol.

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Steven Garcia 1H
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Joined: Fri Sep 28, 2018 12:16 am

Constant Vol.

Postby Steven Garcia 1H » Sun Feb 10, 2019 11:05 pm

Does constant volume always imply that w=0 ?

Samantha Kwock 1D
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Joined: Fri Sep 28, 2018 12:24 am

Re: Constant Vol.

Postby Samantha Kwock 1D » Sun Feb 10, 2019 11:08 pm

Constant volume means that the change in volume is zero. Thus in the work equation, the overall work done would be zero as you would multiply pressure by zero. If volume does not change, then the system does no work,

mahika_nayak_3L
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Joined: Fri Sep 28, 2018 12:26 am

Re: Constant Vol.

Postby mahika_nayak_3L » Sun Feb 10, 2019 11:21 pm

Constant volume means that work is zero because there is no change in the volume, so you know that there is no work of expansion being done within the system.

jessicahe4Elavelle
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Re: Constant Vol.

Postby jessicahe4Elavelle » Mon Feb 11, 2019 12:02 am

The equation for the work is Pext x change in volume, so if the volume is constant, the change in volume is zero therefore pressure is multiplied by zero which is w=0

Rehan Chinoy 1K
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Joined: Fri Sep 28, 2018 12:25 am

Re: Constant Vol.

Postby Rehan Chinoy 1K » Mon Feb 11, 2019 2:35 pm

Since work (w) is equal to (pressure) * (change in volume), if there is no change in volume then work must be equal to zero.

Brian Hom 2F
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Joined: Fri Sep 28, 2018 12:24 am

Re: Constant Vol.

Postby Brian Hom 2F » Mon Feb 11, 2019 3:19 pm

When the volume is constant, this means that work equals zero because work=-PdeltaV and work=-nRTln(V2/V1). At constant volume, both of these equations lead to the work equaling zero.

Jack Hewitt 2H
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Joined: Fri Sep 28, 2018 12:27 am

Re: Constant Vol.

Postby Jack Hewitt 2H » Tue Mar 05, 2019 2:32 pm

Yes, when volume does not change work or "w" is equal to 0.

Mark 1D
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Joined: Fri Sep 28, 2018 12:18 am

Re: Constant Vol.

Postby Mark 1D » Sun Mar 10, 2019 7:52 pm

Work is zero if no change in volume as there is no expansion or compression

Luis_Yepez_1F
Posts: 50
Joined: Fri Sep 28, 2018 12:18 am

Re: Constant Vol.

Postby Luis_Yepez_1F » Sun Mar 10, 2019 10:45 pm

Yes since if there is no change in pressure, then zero work would be done.


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