ΔS total= 0

[Sunny Wu 3A]

In what scenario does -ΔS_surr=ΔS_system?

[shevanti_kumar_1E]

You can use that when Delta S of the universe equals 0 because
Delta S(universe)=delta S(sys)+Delta S(surr)

Delta S(universe)=0 when the reaction is at reversible reaction is at 0.This is because the heat that flows into the surroundings is being released by the system.

[edward_brodell_2I]

Also, if the thermal universe is considered isolated than any changes inside are contained and exact transactions. Whatever entropy is lost or gained by the system will be lost/gained by the surroundings.

[Kyla Roche 2K]

For a reversible reaction, delta S (surrounding) + delta S (system) = 0 so S (system) = -delta S (surrounding)

[Kimiya Aframian IB]

In what scenario does -ΔS_surr=ΔS_system?

Hi! The scenario in which that statement is true is when delta S universe=0, which is for a reversible reaction because it is slow enough for the surroundings to restore the heat lost by work, therefore making the change in the universe 0. Hope this helps!

[305572629]

this scenario occurs in a reversible reaction! Since reversible reactions in real life occur slowly, the system has time to regain the heat lost by work, so the overall change in entropy of the universe is = to 0.

[Chudi Onyedika 3A]

This occurs when the reaction is reversible.

[Joshua Eidam 2A]

When the reaction is reversible, then the ΔS_universe= 0

[Alexis Sanft 1E]

In what scenario does -ΔS_surr=ΔS_system?

Hi! The scenario in which that statement is true is when delta S universe=0, which is for a reversible reaction because it is slow enough for the surroundings to restore the heat lost by work, therefore making the change in the universe 0. Hope this helps!

Does this mean the system is at equilibrium?

[Kiyoka Kim 3C]

Delta S total equals zero for a reversible process because essentially the change in temperature and pressure is very small, therefore the system is at thermodynamic equilibrium.

[LarisaAssadourian2K]

Hello! That applies to when the reaction is reversible.

[Olivia Smith 2E]

It will happen in reversible reactions where delta s of the universe is equal to zero!

[DPatel_2L]

When the reaction is reversable.

[Neha Jonnalagadda 2D]

This is true when S delta of the universe = 0.