Delta S?


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He whose name cannot be spoken
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Joined: Sat Apr 28, 2018 3:00 am

Delta S?

Postby He whose name cannot be spoken » Sat Mar 16, 2019 6:47 pm

Why does irreversible free expansion mean Delta S=0?
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405112316
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

Re: Delta S?

Postby 405112316 » Sat Mar 16, 2019 8:47 pm

Irreversible situations are always in isolated containers. This means delta S of surroundings equals delta S of system so total delta S is 0.
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hanna_maillard3B
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Delta S?

Postby hanna_maillard3B » Sun Mar 17, 2019 2:06 am

for irreversible expansion, that means that the reaction occurs in an isolated system so neither energy nor matter can be exchanged between system and surroundings. therefore S of system = S of surroundings; so delta (change in) S = 0
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