## Derivatives and Integrals

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Hannah Pham 1D
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

### Derivatives and Integrals

Will we need to use derivatives and integrals on the midterm? Or did we just do that to derive the equations that we use now?

Sydney To 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

### Re: Derivatives and Integrals

I don’t think we need to use derivatives and integrals on the midterm but don’t quote me on this. I think we derived these equations in lecture/notes to understand where these variables and equations come from.

Elisa Bass 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

### Re: Derivatives and Integrals

They might give you the basic equation, ∆S = q/T and expect you to evaluate for the changing value specified in the problem, but as long as you have the formulas or the relationships between variables (like q = nC∆T) memorized, you should be able to work backwards to show the integration/get the formula you need.

Abby-Hile-1F
Posts: 46
Joined: Fri Sep 28, 2018 12:16 am

### Re: Derivatives and Integrals

I feel like we won't need to do any calculations with derivatives. I think those equations were given just to help our understanding.

Ruiting Jia 4D
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

### Re: Derivatives and Integrals

I think we may need to write out the integrals, but no real integrating since we didn't do any of those in class.

Mikka Hoffman 1C
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am
Been upvoted: 2 times

### Re: Derivatives and Integrals

I wouldn't expect integrals or derivatives to be on the midterm, I think they were just used to show how certain equations were derived. It can't hurt to review and know them, though.