## PΔV of Solids and Liquids

Eva Guillory 2E
Posts: 44
Joined: Fri Sep 28, 2018 12:22 am

### PΔV of Solids and Liquids

I understand that when solids and liquids are concerned in relation to the reaction constant P, PΔV is considered insignificant, but why is a change in volume ignored in cases involving substances like water, which visibly increases in volume when frozen?

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

### Re: PΔV of Solids and Liquids

Reactions that have a constant P and involves a solid and/or liquid will result in P$\Delta$V as insignificant. Because the volume of the reactants equals the volume of the products, there is no expansion work.

fgalasso1b
Posts: 32
Joined: Wed Oct 03, 2018 12:15 am

### Re: PΔV of Solids and Liquids

Solids and liquids do not undergo compressions or expansions which makes their volume change zero.

Matthew Mar 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am
Been upvoted: 1 time

### Re: PΔV of Solids and Liquids

Maybe once a substance goes through a phase change, it just has a different set volume for that specific state. Like water as a liquid has a set volume which is different from its set volume as a solid, but their volumes remain constant within the state that they are in at the time.