Ni awọn eya ti o rọrun hydrocarbons, biotilejepe ooru ijona acetylene ko ga ni iyasọtọ, o nmu ooru pupọ wa nigbati o ba sun ni iwaju omi olomi, ojo melo won nipa lilo gaseous omi.
Nitori iṣelọpọ omi to lopin lakoko ijona acetylene, gbigba ooru ti o kere ju wa nipasẹ vaporization, nitorinaa yori si awọn iwọn otutu ti o ga.