9.47 isothermal, irreversible free expansion  [ENDORSED]

isochoric/isometric:
isothermal:
isobaric:

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Lindsay H 2B
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9.47 isothermal, irreversible free expansion

Postby Lindsay H 2B » Mon Feb 05, 2018 2:32 pm

question 9.47 asks for ∆S, ∆Ssurr and ∆Stotal for an isothermal irreversible free expansion of an ideal gas. why is it that the solutions manual assumes ∆U=0 for this system?

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Re: 9.47 isothermal, irreversible free expansion

Postby Chem_Mod » Mon Feb 05, 2018 2:35 pm

The question refers to an isothermal process. When temperature is constant, ∆U=0.

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Re: 9.47 isothermal, irreversible free expansion  [ENDORSED]

Postby Chem_Mod » Mon Feb 05, 2018 2:36 pm

Isothermal processes do not involve a change in temperature. This means is 0. Dr. Lavelle went over the relationship that states =
Any isothermal process thus implies that the internal energy change, is 0.


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