Entropy of an Ideal Gas

Volume:
Temperature:

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Kaelie Blanes-Ronda 2L
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Entropy of an Ideal Gas

Postby Kaelie Blanes-Ronda 2L » Thu Jan 25, 2018 8:33 pm

How is the entropy of an ideal gas related to its volume in an isothermal expansion?

Caroline C 1G
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Re: Entropy of an Ideal Gas

Postby Caroline C 1G » Thu Jan 25, 2018 8:49 pm

When there is a change in volume during isothermal expansion, the entropy of an ideal gas is related to its volume by the equation: delta S=nRln(V2/V1).

Aditya Pimplaskar 1J
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Re: Entropy of an Ideal Gas

Postby Aditya Pimplaskar 1J » Thu Jan 25, 2018 9:50 pm

Note that the formula in the previous reply (ΔS = n*R*ln(V2/V1)) applies when you plug in moles of gas (n). In a more general sense, ΔS = Kb*ln(W2/W1). When you multiply Kb by Avogadro's number, you end up with R. ΔS ends up q/T, where at a constant temperature, change in entropy is linked to a change in heat supplied reversibly.


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