PΔV of Solids and Liquids

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

PΔV of Solids and Liquids

Postby Eva Guillory 2E » Fri Feb 01, 2019 1:41 pm

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

Postby Sydney To 1D » Fri Feb 01, 2019 1:47 pm

Reactions that have a constant P and involves a solid and/or liquid will result in PV 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

Postby fgalasso1b » Fri Feb 01, 2019 2:23 pm

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

Postby Matthew Mar 1J » Sat Feb 02, 2019 9:19 pm

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.

Hadji Yono-Cruz 2L
Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

Re: PΔV of Solids and Liquids

Postby Hadji Yono-Cruz 2L » Sat Feb 02, 2019 10:14 pm

Solids and liquids do not compress or expand, so their volume does not change.


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