The pressure necessary to obtain 50 % dissociation of PCl ₅ at 400 K is numerically equal to ....... times of Kp.

Step-by-step solution

PCl ₅ PCl ₃+ Cl ₂ array ccc a & a & =0.50 a - ax & a ^2 & a array K _ p = ^2 P 1- ^2 ~K _ p P = 0.5 0.5 0.75 P K _ P =3 P =3 K _ P