## Constant Vol.

Steven Garcia 1H
Posts: 79
Joined: Fri Sep 28, 2018 12:16 am

### Constant Vol.

Does constant volume always imply that w=0 ?

Samantha Kwock 1D
Posts: 61
Joined: Fri Sep 28, 2018 12:24 am

### Re: Constant Vol.

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
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: Constant Vol.

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
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

### Re: Constant Vol.

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
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

### Re: Constant Vol.

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
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

### Re: Constant Vol.

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
Posts: 67
Joined: Fri Sep 28, 2018 12:27 am

### Re: Constant Vol.

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

Mark 1D
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

### Re: Constant Vol.

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.

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