## Reversible systems

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

Tiffany Cao 1D
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### Reversible systems

If there was a there is a change in volume and pressure, would we use Cv or Cp to calculate entropy?

Nisarg Shah 1C
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### Re: Reversible systems

I believe you would have to use both because you have to add the change in entropy associated with volume and the change in entropy associated with pressure to find the total entropy change of the system.

Scout_2C
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### Re: Reversible systems

Yep, you would find deltaS for the volume change, then the deltaS for the pressure change then add these values up to find deltaS total.

Emma Miltenberger 2I
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### Re: Reversible systems

In this case, both the pressure and volume contribute to the overall deltaS. Therefore, you would calculate each individually using Cp and Cv and add those respective values together.

Christy Zhao 1H
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### Re: Reversible systems

Yes, you would calculate the change in entropy for the change in volume and the change in pressure, and add the entropy changes together.

Rachel Lu_dis1H
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### Re: Reversible systems

Yes since both change in volume and change in pressure increase entropy, you would would calculate the entropy from volume and pressure, then add them together.

Timothy Kim 1B
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### Re: Reversible systems

You would find the entropy change for both change in pressure and volume and add the net change for this reaction.

Amelia Georgius 1K
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### Re: Reversible systems

Because both volume and pressure are changing, you would need to use both Cv and Cp