delta S
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Re: delta S
Delta S (surroundings) is zero under free expansion; delta S (universe) is zero under reversible conditions and equilibrium; delta S (system) should be zero when there is no transfer of heat from and to the system and when the temperature and volume are constant in the system.
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Re: delta S
Delta S of the system equals zero when there is no heat entering the system, because detla S = q(reversible)/T.
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Re: delta S
For a system at equillibrium, the total delta s equals zero. For n irreversible expansion, given that there is no effect on the surroundings, delta s system equals delta s total.
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Re: delta S
Like the replies above, delta S of the universe, or when negative delta S of the system is equal to delta S of the surroundings, is 0 when the reaction is at equilibrium and is reversible. Also, delta U would be 0.
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Re: delta S
The change in entropy would be zero when the heat transferred into or out of the system is 0.
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