## Reversible Reactions vs. Irreversible Reactions

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

TanveerDhaliwal3G
Posts: 105
Joined: Fri Aug 30, 2019 12:17 am

### Reversible Reactions vs. Irreversible Reactions

Should we be able to produce the graphs associated with each?

Shrayes Raman
Posts: 129
Joined: Sat Jul 20, 2019 12:15 am

### Re: Reversible Reactions vs. Irreversible Reactions

Yes I think so. The Irreversible graph is always straight and the Reversible graph is curved starting at a higher pressure and with a negative slope

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

### Re: Reversible Reactions vs. Irreversible Reactions

I'm not sure but it wouldn't hurt to know! It's pretty easy because irreversible one would just have a straight horizontal line for y-axis because pressure would be constant. Reversible graph has larger surface area below the curve. The surface area represents work. Less work is done for irreversible reaction because it's done against constant external pressure whereas reversible one is in equ.

Posts: 111
Joined: Thu Jul 25, 2019 12:17 am

### Re: Reversible Reactions vs. Irreversible Reactions

I feel like it wouldn't hurt to know...there were a few graph questions on the 14A midterm and final last quarter...

Maria Poblete 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: Reversible Reactions vs. Irreversible Reactions

I don't think it would hurt to memorize, the reversible curve expresses a large change in pressure with a negative slope, and the irreversible curve is simply a straight horizontal line.

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

### Re: Reversible Reactions vs. Irreversible Reactions

The reversible is curved and downscoping, and the irreversible graphs are straight. It shows how less work is done for the irreversible processes.

sarahsalama2E
Posts: 164
Joined: Fri Aug 30, 2019 12:16 am

### Re: Reversible Reactions vs. Irreversible Reactions

I think it's important to understand the reason why a reversible graph employs the integral because the pressure is not constant so the area under the curve that needs to be found/solved as pressure changes infinitesimally while volume is simultaneously changing. The integrated area under the curve for a reversible reaction is a larger area than for a irreversible reaction because the work done against pressure is constant, so it is a straight line, therefore the area is less, and the work for an irreversible reaction is less.