tmunyon2 tmunyon2 09-09-2016 Chemistry contestada When a mixture of PH3, P2, and H2 comes to equilibrium at 873 K according to the reaction 2PH3(g)←−→P2(g)+3H2(g)Kp = 398 at 873 K, where Pp2 = 0.414 atm and PH2 = 0.827 atm .