Usually volume occupied by the gas is defined as the the volume of the container, but as it expands freely (Joule's free expansion), we can't say anything about volume in a concrete sense as we don't have a rigid container. How do we think about this in a more concrete way?
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$\begingroup$ We would first need the criterium what is a gas and what is vacuum. $\endgroup$– PoutnikCommented Sep 10, 2020 at 10:29
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$\begingroup$ What about $V \to \infty$? $\endgroup$– Safdar FaisalCommented Sep 10, 2020 at 10:31
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$\begingroup$ I often see people talking about expansions in a vacuum , how do they do this without something to concretely call volume? $\endgroup$– BrianCommented Sep 11, 2020 at 10:56
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$\begingroup$ Particularly, it is undefined. $\endgroup$– PoutnikCommented Sep 13, 2020 at 12:11
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