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W=-P(deltaV) sign

Posted: Tue Feb 13, 2018 8:37 pm
by Jack Papciak 2F
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.

Re: W=-P(deltaT) sign

Posted: Tue Feb 13, 2018 8:39 pm
by Emily Glaser 1F
p delta V?

Re: W=-P(deltaT) sign

Posted: Tue Feb 13, 2018 8:47 pm
by Jack Papciak 2F
Sorry it should be a V not a T

Re: W=-P(deltaV) sign

Posted: Wed Feb 14, 2018 4:19 pm
by ZoeHahn1J
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.