已知下列前三個(gè)反應(yīng)的平衡常數(shù)分別為KØ1、KØ2和KØ3則第四個(gè)反應(yīng)的KØ4為() (1) N2(g)+O2(g)=2NO(g) (2) H2(g)+1/2O2(g)=H2O(g) (3) 2NH3(g)+5/2O2(g)=2NO(g)+3H2O(g) (4) N2(g)+3H2(g)=2NH3(g)