S vs Stotal

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vanessas0123
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Joined: Wed Sep 11, 2019 12:17 am

S vs Stotal

Postby vanessas0123 » Thu Feb 13, 2020 9:54 am

What is the difference between delta S and delta S total?

Nathan Nakaguchi 1G
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Joined: Wed Sep 18, 2019 12:22 am
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Re: S vs Stotal

Postby Nathan Nakaguchi 1G » Thu Feb 13, 2020 10:15 am



Usually if its just then it is the change in entropy of the system, the total change in entropy refers to both the change in entropy by the system and the surroundings.

Abby Soriano 1J
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Re: S vs Stotal

Postby Abby Soriano 1J » Thu Feb 13, 2020 11:40 am

Typically delta S refers to the delta S of the system while delta S total (delta S of the system + delta S of the surroundings) refers to the delta S of the universe.

Robin Cadd 1D
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Re: S vs Stotal

Postby Robin Cadd 1D » Thu Feb 13, 2020 12:53 pm

Delta S refers to the entropy of the system, and Delta Stotal refers to the total entropy (entropy of the system + entropy of the surroundings).

Andrew Liang 1I
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Joined: Fri Aug 30, 2019 12:18 am

Re: S vs Stotal

Postby Andrew Liang 1I » Thu Feb 13, 2020 1:51 pm

Delta S is usually referred to the change in entropy of the system. Change in entropy of the surrounding is written as delta S(sur).
Delta S total is the sum of delta S and delta S(sur)

Kayli Choy 2F
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Joined: Sat Aug 24, 2019 12:17 am

Re: S vs Stotal

Postby Kayli Choy 2F » Sat Feb 15, 2020 9:05 pm

Additionally, for isothermal reversible reactions, delta S total = 0, so delta S = -delta S(surroundings). For isothermal irreversible reactions, delta S(surroundings) = 0, so delta S total = delta S, and the entropy of the universe increases

Nicholas_Gladkov_2J
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Re: S vs Stotal

Postby Nicholas_Gladkov_2J » Sat Feb 15, 2020 10:07 pm

vanessas0123 wrote:What is the difference between delta S and delta S total?


What is meant by delta S, it is the entropy of the system.
Delta S total is the entropy of both the system and the surroundings.

Esha Chawla 2E
Posts: 108
Joined: Thu Jul 25, 2019 12:17 am

Re: S vs Stotal

Postby Esha Chawla 2E » Sat Feb 15, 2020 10:20 pm

vanessas0123 wrote:What is the difference between delta S and delta S total?


Delta S is simply the entropy of the system, while Delta S total accounts for the entropy of the system and the surroundings, or the universe.


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