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In class, my TA said the closer the temperature of a gas is to the critical temperature, the more ideal it is. I'm struggling to understand this, as I thought more ideal behavior occurs at high temperature and low pressure. I am probably missing something really obvious :(

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  • $\begingroup$ You're right. Pressure and temperature interact in a compressible gas. So any sweeping statement about either pressure or temperature alone is spurious. $\endgroup$ – MaxW Sep 21 '17 at 22:31
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    $\begingroup$ I'd say critical behavior is the farthest possible from ideal. $\endgroup$ – Ivan Neretin Sep 14 '18 at 10:25

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