W=-P(deltaV) sign


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Jack Papciak 2F
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

W=-P(deltaV) sign

Postby Jack Papciak 2F » Tue Feb 13, 2018 8:37 pm

Why is there a negative in front of V? I know it has something to do with work done on the system/surroundings but I am confused which sign goes with what.
Last edited by Jack Papciak 2F on Tue Feb 13, 2018 8:47 pm, edited 1 time in total.
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Emily Glaser 1F
Posts: 156
Joined: Thu Jul 27, 2017 3:01 am

Re: W=-P(deltaT) sign

Postby Emily Glaser 1F » Tue Feb 13, 2018 8:39 pm

p delta V?
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Jack Papciak 2F
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

Re: W=-P(deltaT) sign

Postby Jack Papciak 2F » Tue Feb 13, 2018 8:47 pm

Sorry it should be a V not a T
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ZoeHahn1J
Posts: 63
Joined: Sat Jul 22, 2017 3:01 am
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Re: W=-P(deltaV) sign

Postby ZoeHahn1J » Wed Feb 14, 2018 4:19 pm

If there is an increase in V, work is being done by the system, so w will be negative. When work is being done on the system, there will be a decrease in V, so work will be positive.
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