## reversible and irreversible with entropy

$\Delta S = \frac{q_{rev}}{T}$

Clement Ng
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### reversible and irreversible with entropy

deltaS= q(rev)/T. Will we ever use q(irrev)to calculate deltaS and if so when?

Kellina Tran 2I
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

### Re: reversible and irreversible with entropy

I believe we only use it for reversible reactions, but someone correct me if I’m wrong

Cynthia Tsang
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### Re: reversible and irreversible with entropy

No you won't ever use q(irrev) to calculate the deltaS, but you can use the fact that entropy is a state function to find the amount of energy needed for an irreversible reaction.