Integral Expression for Work


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bonnie_schmitz_1F
Posts: 81
Joined: Fri Sep 28, 2018 12:24 am
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Integral Expression for Work

Postby bonnie_schmitz_1F » Wed Feb 06, 2019 5:24 pm

Will we ever need to use the integral equation or do we just need to understand it and be able to apply the variations of it?

Cole Elsner 2J
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

Re: Integral Expression for Work

Postby Cole Elsner 2J » Wed Feb 06, 2019 5:56 pm

The integral equation applies to reversible work, where P is not a constant. Use it if stated to be reversible. Use w=-PdeltaV if it's irreversible.

Lia Inadomi 1I
Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

Re: Integral Expression for Work

Postby Lia Inadomi 1I » Wed Feb 06, 2019 9:37 pm

You only need to know it to understand the derivation of the 2nd law of thermodynamics. The actual equations used do not include the integral.

Gillian Murphy 2C
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

Re: Integral Expression for Work

Postby Gillian Murphy 2C » Wed Feb 06, 2019 9:43 pm

My TA said that the only equations we will have to use for work are w=-PΔV (for a system with constant pressure) and w=-nRT(ln(V2/V1)) (for a reaction that is isothermal reversible). The integral is more for understanding than actual needing to use the equation to solve it for this class (I think)

Eric Quach 1C
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: Integral Expression for Work

Postby Eric Quach 1C » Thu Feb 07, 2019 10:59 pm

I think we just need to know how to apply it. The integral was used to help explain how the formula w=-PdeltaV was derived.


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