## reversible and irreversible [ENDORSED]

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

Hannah Guo 3D
Posts: 56
Joined: Fri Sep 29, 2017 7:06 am

### reversible and irreversible

I'm a little bit confused about formulas for reversible and irreversible work, and formulas to use when P or V is constant. Can someone please explain? Thank you!

Riya Pathare 2E
Posts: 74
Joined: Sat Jul 22, 2017 3:01 am
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### Re: reversible and irreversible

The main formula for internal energy is deltaU = deltaH - PdeltaV however when pressure is constant we can say that deltaH = q and when volume is constant that means deltaV will equal 0 since there was no change so deltaU = deltaH.

Chem_Mod
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### Re: reversible and irreversible  [ENDORSED]

In class tomorrow (Wed) I will go through reversible and irreversible expansion in detail.