Assertion: nitrogen dioxide's gas | /r/CapableOf | exhibit this phase change
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text: Some other gases exhibit this phase change if the ambient temperature is low enough; this includes ethylene (R1150), carbon dioxide (R744), ethane (R170), nitrous oxide (R744A), and sulfur hexafluoride; however, these can only be liquefied under pressure if kept below their critical temperatures which are 9 °C for C 2 H 4 ; 31 °C for CO 2 ; 32 °C for C 2 H 6 ; 36 °C for N 2 O ; 45 °C for SF 6 .