## Reactions at constant pressure

$\Delta U=q+w$

Clara Cho 2K
Posts: 103
Joined: Wed Sep 18, 2019 12:18 am

### Reactions at constant pressure

Why is is PdV insignificant when a reaction is at constant pressure and involves solids and liquids?

Kassidy Ford 1I
Posts: 103
Joined: Sat Aug 17, 2019 12:16 am
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### Re: Reactions at constant pressure

I think it's because it is very difficult to change the volume of solids and liquids by a significant amount.

Alice Ma 2K
Posts: 52
Joined: Wed Nov 13, 2019 12:26 am

### Re: Reactions at constant pressure

For solids and liquids, the volume is difficult to change when the pressure is constant, also the number would be so small that it is negligible.