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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?
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.
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