entropy

[Ishita Monga 1B]

What is the difference between deltaS^o and deltaS_tot?

[Samantha Kan 2L]

In the book, it usually has delta S as the entropy of the system, while it specifies the entropy of the surroundings and total entropy with delta Ssurr and delta Stot respectively. Delta Stot would therefore be delta S + delta Ssurr.

[Riya Pathare 2E]

the deltaStot would also be able to tell you whether the reaction would be spontaneous or not while the deltaS would not be able to tell you that. With just delta S you would need to calculate delta G in order to find spontaneity.

[Jessica Jones 2B]

for reversible reactions, does deltaStot(or universe) always equal 0?

[Veritas Kim 2L]

I think that is the definition of a reversible deltaStot. For a it to be considered a reversible reaction, entropy of the system must be exactly the opposite of the surrounding and vice versa.