14.已知下列前三个反应的经验平衡常数为K1、K2、K3,则第四个反应的K应等-|||-于 __ _。-|||-(s)+CO(g)=!=!= Co(s)+C(O)_(2)(g)-|||-(O)_(2)(g)+(H)_(2)(g)=!=!= CO(g)+(H)_(2)O(l)-|||-_(2)O(l)=!=!= (H)_(2)O(g)-|||-(s)+(H)_(2)(g)=!=!= Co(s)+(H)_(2)O(g)-|||-(a) _(1)+(K)_(2)+(K)_(3) (b) K1-K2 -K3 (c)K1K2K3 (d) _(1)(K)_(3)/(K)_(2)