Assertion: hydrocarbon's boiling point | /r/CapableOf | lie below −180 °c
Facets:
Source sentences:
text: This is a logical dividing line, since the normal boiling points of the so-called permanent gases (such as helium, hydrogen, neon, nitrogen, oxygen, and normal air) lie below −180 °C while the Freon refrigerants, hydrocarbons, and other common refrigerants have boiling points above −180 °C.