ER$18$ Wodzraa ethylbenzene kple isobutane $$o $$e nya$$o$$eamenu $$e nugoe me le dzox$$x$15$ bar kple $350\backslash$deg C me$.$ To Lewis Randall $$e ts$$ts$$ s$$ kple wo n$$ewo me la$,$ de dzesi fugacity na vapor component $$esia$$e ne wobu e$$u be ethylbenzene vapor mole fraction nye $0\mathrm{.}7.$ Gbl$$ nya tso susu si wosusu $$u$.$