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Is there any theoretical/hypothetical way through which a gas can be liquified above critical temperature? For example applying inifinjte amount of pressure to the system?

MSKB
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    Already well answered here: https://chemistry.stackexchange.com/a/37179/79678. Also, applying infinite pressure would force the poor gas to become a black hole! ;-) – Ed V Apr 17 '21 at 18:30
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    At the critical point, both liquid and gas have the same density, which is $\pu{0.34 g/mL}$ for water. So at this point the limit between liquid and gas simply disappears. At higher pressures and higher temperatures, your stuff can be considered as made of a liquid or of a gas. – Maurice Apr 17 '21 at 18:37

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