The trimerization, 3A(g) --> A3(g,l) is carried out isothermally and without pressure drop in a PFR at 298 K and 2 atm. As the concentration of A3 increases down the reactor and A3 begins to condense....

Extracted text: The trimerization, 3A(g) --> A3(g,l) is carried out isothermally and without pressure drop in a PFR at 298 K and 2 atm. As the concentration of A3 increases down the reactor and A3 begins to condense. The vapor pressure of A3 at 298 K is 0.5 atm. If an equal molar mixture of A and inert, I, is fed to the reactor at what conversion of A will A3 begin to condense? A(g) --> (1/3)A3(g,l) Condensation begins at y = Py/PT = 0.5 atm /2 atm = 0.25